mac keeps self assigning ip address

How to fix “self-assigned IP address” issue on Mac

Is your MacBook struggling to access the internet, though your Wi-Fi or Ethernet works fine? This can be due to the self-assigned IP error on your Mac. Worry not! In this guide, I’ll share how to fix the internet not working due to a self-assigned IP address error on your Mac to regain a stable network connection. 

But before we jump into the troubleshooting steps to resolve the issue, let’s understand what a self-assigned IP error is.

What does “self-assigned IP address” mean on Mac? 

The “self-assigned IP address” error on Mac refers to a situation where your device assigns an IP address and sets up an ad-hoc network instead of obtaining one from the network router or DHCP (Dynamic Host Configuration Protocol) server. This self-assigned IP address is not legitimate or acknowledged on the network.

That’s why your Mac cannot connect to the internet or other devices on the network, resulting in limited or no network connectivity. This issue occurs due to network configuration conflicts, DHCP server unavailability, or problems with Mac’s network or Firewall settings.

So, what to do when your Mac has a self-assigned IP address? Continue reading to get rid of the issue and restore standard network functionality on your Mac. 

• Check your connection
• Reboot your network devices
• Rejoin your Wi-Fi network
• Check your connection settings
• Reset your Network Preferences on Mac
• Renew DHCP Lease on macOS
• Create a new network location
• Reset the Firewall on your Mac
• Set Service Order from Mac’s network settings
• Change DNS Servers on macOS
• Check for conflicting IP address
• Disable VPN

1. Check your connection

Before diving into Mac-specific settings, ensure that your router is functioning correctly and located near your Mac to obtain a valid IP address. Besides, if you are using an Ethernet connection, plug in the cable snugly.  

I also check to validate that the cable has no fault and is in good condition. Moreover, If you are using an old Wi-Fi router, discard it and get a new one to obtain a smoother connection.

2. Reboot your network devices

Restarting both your modem and router can often resolve temporary network glitches. Power off the devices, unplug the cables and wait a few seconds. It will help them cool down, as excessive heat can cause malfunctions. After that, plug all cables, connect them to the power outlet, and turn them back on.   

In the meantime, restart your Mac once to iron out any bugs in macOS.   

• Click the Apple logo .

3. Rejoin your Wi-Fi network

Sometimes, simply forgetting and rejoining your Wi-Fi network can solve the self-assigned IP address error on your Mac.   

• Turn off Wi-Fi for a few seconds and toggle it on.

4. Check your connection settings

Verify that your Mac’s network settings are configured correctly. You must opt for the appropriate network settings to obtain IP addresses and DNS information automatically. 

• Go to your Wi-Fi Details .  I have shown the steps above.  
• Select TCP/IP from the left panel. 

You may also try turning off the IPv6, as some users reported it conflicted with the IP address assigning procedure.

• Click on the drop-down arrow beside Configure IPv6 . 

5. Reset your Network Preferences on Mac 

Resetting the network preferences can help eliminate IP address misconfiguration, causing the internet to not work. So, you must delete specific network connectivity-related files from your MacBook.

• Launch  Finder .

• Enter your Mac password to authenticate the deletion.
• Restart your Mac. It will automatically recreate the deleted files.
• Log in and connect to your Wi-Fi network.
• Go to the  TCP/IP  setting again and check the router files.

6. Renew DHCP Lease on macOS

This method is effective when the assigned IP address may have expired or encountered conflicts. When you renew the DHCP Lease, your Mac requests a new IP address from the DHCP server. It ensures a fresh and valid configuration and resolves connectivity issues.  

• Open the same TCP/IP tab window from Wi-Fi Details, as shown above. 

After renewing the lease, check if you can connect to your network. If that doesn’t help, try creating a New Network Location and renewing the lease.

7. Create a new network location

Creating a new network location lets your Mac start fresh with network settings and eliminate a self-assigned IP address.  

• Click the  Apple logo →  System Settings .

• Wait for a few seconds until your Mac connects to your Wi-Fi.

Repeat the steps of renewing the DHCP lease on your Mac, and then try connecting to your network.

When you try to perform configuration changes to the system, your Mac’s firewall experiences configuration issues. Let’s fix this problem by resetting the Firewall.

8. Reset the Firewall on your Mac

• In the menu bar, click  Go  → Go to   Folder .

• Restart your Mac.

After your system boots, it’ll ask you to allow access to numerous programs and services. You may choose to enable access depending upon your choice. Then, try connecting to your network and check if the self-assigned IP address error persists.

If you are unsure about deleting the Firewall files, you may temporarily disable it. Toggling off the Firewall on your Mac can help determine if it’s causing conflicts with network connectivity.

• Select  Network  from the left panel → Choose Firewall .

• Restart your Mac and turn it on again.

9. Set Service Order from Mac’s network settings 

Adjusting the service order can prioritize the network interface, ensuring your Mac connects to your preferred network. 

• Click the  Apple logo →  System Settings →  Network .

10. Change DNS Servers on macOS

Discarding existing DNS and switching to alternative DNS servers can resolve DNS-related issues that may contribute to the self-assigned IP address error.  

• Open System Settings → Wi-Fi → Click Details beside your Wi-Fi name.

• Add   these numbers: 8.8.8.8 8.8.4.4 1.1.1.1 9.9.9.9

11. Check for conflicting IP address 

Ensure that no other devices on your network use the same IP address as your Mac. Check your router’s DHCP client list and verify that all devices have unique IP addresses assigned.

12. Disable VPN 

If you have a VPN service enabled, disable it temporarily to see if it resolves the self-assigned IP address error. Open your Mac’s VPN settings and turn off the VPN connection. 

Bonus fixes 

You may need to attempt more complex fixes if the troubleshooting techniques outlined above do not fix the self-assigned IP address problem on your Mac:

• Update your Mac to the latest OS version.
• Verify your Mac is not infected with any malware or viruses. 
• Ensure your network devices are operating well and there are no hardware problems. 
• Reset NVRAM or PRAM on Mac to clear up the system settings memory. 

To use a static IP address, go to Apple logo → System Settings → Network → Wi-Fi → Details beside Wi-Fi name. Select TCP/IP → dropdown arrow next to Configure IPv4 . Choose Using DHCP with Manual Address and enter the static IP address. Click on OK to save.

Get back your smooth internet access!

Encountering a self-assigned IP address error on your Mac hampers your work, so you should address it ASAP. You can tackle the issue and restore a stable and reliable network connection using these troubleshooting techniques. If the problem isn’t resolved, contact Apple Support and seek assistance.

Explore more…

• MacBook connects to Wi-Fi but has no Internet? 12 Fixes  
• Wi-Fi not working on Mac? 10 Ways to fix!  
• How to Run Wi-Fi Diagnostics on Mac for Better Network Connections  

Readers like you help support iGeeksBlog. When you make a purchase using links on our site, we may earn an affiliate commission.  Read more .

After much internet searching – these clear, easy directions were a lifesaver. The second suggestion worked perfectly! Thank you!!

Thank you sooooo much !!! I was really struggling to get my Ethernet adapter to connect to my MacBook and I tried the first option and it works now!!!! God bless you and your family.

Thank you soooo much. Resetting the Firewall worked

THANK YOU!!!!! What a PITA this has been. Four hours of struggle, and your post solved the prop in seconds. I could climb through my phone and kiss you I’m so happy! Hero!

Thank you soo muchhh!!! Finally after 3 hours desperated, and you helped me 😭👍

Your directions and explanations were clear, easy to follow, and a perfect translation of technical for a layman.

Thank you very much for this fix tips!

I was ready to completely reboot my whole MPB to its factory settings. What worked best for me was your tip called: Create a new network location.

Thanks again. Remko

Yesss!! Resetting the firewall did it for me!

changing DNS worked!! thank you

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How do I get rid of a self assigned IP address?

I've tried all the usual things like restarting the computer and modem. Other devices in the house are able to connect. Sitting side by side.

I've had this iMac for a number of years but never encountered this before. I found this blog about the issue but it did not work for me - https://www.igeeksblog.com/internet-not-working-due-to-self-assigned-ip-address-on-mac/

I did not have the 'com.apple.network.identification.plist' file so wasn't able to delete it. Seems like a number of others who didn't have the file couldn't fix the problem either.

What can I do? It's impossible to get any work done as this computer is my main one! I'm running Catalina 10.15.3

Hoping someone out there can help.

iMac 27", macOS 10.15

Posted on Mar 21, 2020 7:21 PM

Hi Veronica.

Normally it's due to a bad cable or refusal of a Router/Modem to hand out IPs via DHCP.

Make a New Location, Using network locations in Mac OS X ...

http://support.apple.com/kb/HT2712

System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.

If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

Posted on Mar 21, 2020 8:25 PM

Mar 22, 2020 4:09 AM in response to BDAqua

In the Open Network Preferences panel. Under WIFI -

• instead of the normal green light, saying connected, with network symbol all blue
• I have a yellow light, saying no IP address - but the network symbol is all blue just like being connected

Mar 22, 2020 8:53 AM in response to rayver

OK, under the Wifi icon at top, click on it, what choices does it show?

Did you do the rest of my suggestions, especially this one?

Loading page content

Page content loaded

Mar 21, 2020 8:25 PM in response to rayver

Mar 21, 2020 10:22 PM in response to BDAqua

Thanks - I just made a new location and It just connected to the internet! Wow! Can’t thank you enough!

I didn’t do any more than that - should I?

the wifi box is yellow and says no ip address (it said self assigned ip before). Is that ok? It does show the wireless symbol in full blue.

Mar 21, 2020 10:32 PM in response to rayver

If you're connected great, but each interface has it's own IP, which interface says no IP?

Press ESC to close

How to Fix the Self Assigned IP Address Issue on Mac

At times macOS users face the self-assigned IP address malfunction on their computer. Your Mac will keep alerting you to the ‘internet not working’ pop-up even if you have a Wi-Fi network connection.

It allows the network interface to make a malfunctioning ad-hoc network. There can be many reasons for network issues like a broken cable, DHCP server problem, network location, etc. But, it gets better if you know the correct way to troubleshoot the issue.

Table of Contents

Fixes for the self-assigned IP address issue

Self-assigned IP issues can frustrate users and cause internet issues. But, fret not, you can fix self-assigned IP address malfunction using any of the methods mentioned below:

• Restart your modem

Before trying any other method to fix the internet issue restart your modem to see if it works. Click the ‘Wi-Fi’ button from the top menu on the Mac to turn it off. Please wait for a few minutes and then turn it back on. Check to see if the issue is fixed.

If this hack works, you will see the Wi-Fi connection running on your Mac with a proper IP address.

• Re-enable the network preferences

To reset network preferences on your computer, follow these steps:

• Open Mac, launch ‘Finder,’ and in the top menu bar, tap on ‘Go to Folder’ from the drop-down menu of the ‘Go’ bar
• A new window will appear, type ''/Library/Preferences/SystemConfiguration/'' and press enter
• The System Configuration window will open. Then delete the following commands: ‘ com.apple .airport.preferences.plist, Networkinterface.plist and preferences.plist’ to reset network configurations
• Please only delete the files if you have no issue losing the network configuration
• Please switch off the Mac and then switch it back on; try and link to the Wi-Fi again
• Open TCP/IP settings again and look for the files that you deleted
• You will find the removed files back in the old folder

• Renew DHCP lease

One of the most common fixes to the ‘self-assigned IP issue’ is to renew the DHCP lease. A DHCP lease temporarily assigns an IP address to a device connected to the internet.

If the internet connection is malfunctioning, follow these steps to renew your DHCP lease:

• Tap the Apple logo on the top-left menu bar, then visit the ‘System preferences’ section
• Then click on ‘Network settings’ and click ‘Advanced’ in the Wi-Fi section
• Then select the ‘TCP/IP’ section and tap on the ‘Renew DHCP lease’ button and select OK
• After renewing the lease, check if you can connect to your Wi-Fi

• Make a different network location/ new location

One way to fix self-assigned IP is to set up new network locations on your Mac. Follow the steps below to make a new network location:

• Tap on the Apple logo from the menu bar and select ‘System preferences’
• Enter the ‘Network settings’ then tap on ‘Drop-down menu’ near the Location tab
• Then tap on ‘Edit locations’ and tap on the ‘+’ button and add a ‘new network location’ and tap on done
• Choose ‘Wi-Fi’ or Ethernet; if not selected automatically
• Then press on ‘Advanced’ button and again press the ‘Renew DHCP lease button’ and enter
• This will set a ‘new location’ on the device
• Reset Firewall

Primarily self-assigned IP address malfunction occurs when the system’s Firewall undergoes configuration problems. If you have performed significant configuration changes on a Mac, settings may not migrate properly. It causes a Firewall issue and might disrupt the network connection.

To fix the firewall configuration issue, follow these steps:

• Click the ‘Finder’ icon to launch it, then select ‘Go to folder’ in the ‘Go’ menu bar
• In the pop-up window, enter the following command /Macintosh HD/Library/Preferences/
• In the new window, delete the ‘com.apple.alf.plist’ command
• After the Mac restarts, reboot it and check if the Wi-Fi connects

Note that after the system boots, you would have to allow connections for the numerous programs temporarily. 

• Setup the service order in network settings

If your Mac has a self-assigned IP address issue, try resetting the service order of Wi-Fi in the network settings.

To set ‘Service order’ on Mac, follow these steps:

• Select the Apple logo on the screen and click ‘system preferences’
• Click on ‘Network icon and then press on the gear icon
• Then tap ‘Set service order,’ and drag the services you are using at the start of the file
• For example, if you are utilizing Wi-Fi, select ‘Wi-Fi’ and put it on the first number

• Change DNS servers

DNS servers change the domain name to IP addresses. Try changing the DNS servers to see if the issue fixes. Follow these steps:

• Select the Apple logo and click ‘system preferences,’ then click on the ‘Network’ icon
• Select the Wi-Fi icon or Ethernet you use (if not selected already)
• Then choose the ‘DNS’ tab in the ‘Advanced’ section and press ‘+.’
• Add the following numbers to the DNS server list: ‘8.8.8.8, 8.8.4.4, 1.1.1.1, 9.9.9.9’ and click ‘OK’
• It will most likely fix the self-assigned IP address problem in your Mac

Contact an Apple support team tech. If the above methods do not fix your Mac’s self-assigned IP address issue.

What does self-assigned IP mean on Mac?

Self-assigned IP is one of the reasons why you are unable to use the internet on your device. It mainly occurs when your network router does not provide your device’s IP address, causing internet connection issues.

How do I give my Mac a static IP address?

You can give your Mac a static IP by following the steps below:

• Select the Apple logo and click ‘System preferences’
• Click on the ‘Network’ tab and then select the ‘Advanced button’ 
• ON TCP/IP section, open the configure IPv4 list and select ‘manually’
• Enter your IP settings in the field, and the static IP address will the assigned 

Conclusion 

By now, you must have learned how to fix self-assigned IP on your computer. Though it is not a huge problem, it does cause a lot of frustration among users. Hopefully, you found the article helpful and learned how to fix network malfunctions on your mac OS.

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Marid is a lifelong tech enthusiast and is the lead editor of Macdentro.com. An expert on all things Apple and a lifelong Mac user. Marid has over 10 years of experience using Apple products including the Apple watch, Ipad and etc

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What is Self-Assigned IP and How to Fix it

The self-assigned IP error may prevent your Mac from connecting to the Internet. You may get an Internet connection error messages such as “Wi-Fi has the self-assigned IP address and will not be able to connect to the Internet.” If you investigate this issue further, you will see that the Network pane in System Preferences will also show a notification message saying “Self-Assigned IP” with a yellow dot instead of the regular “Connected” message under the network service, as you can see in the screenshot below. This problem may occur when Mac is connected to a wired, wireless (Wi-Fi), or hotspot connection.

This problem occurs when a self-assigned IP address is issued to network interfaces. When this issue happens, not all computers connected to the same network may be affected. For example, in the same home, one Mac may have this problem while other similarly configured Macs may have no problem at all, even though they all are using the same Wi-Fi connection. This may mean that the root of the problem is how the problem Mac is configured. Several factors may cause this issue, such as:

• Bad cable connections.
• Not getting an IP from the router or modem.
• Failure of the DHCP server.

Follow the steps below to address this problem. Please try the steps in this order. After trying each step, check to see if your problem is fixed. If it is not fixed and if you still see the Self-Assigned IP error, move to the next step.

Self-Assigned error troubleshooting steps

Check your router/modem : If you are connected over Wi-Fi, ensure that your Mac is not too far away from the router/modem.

Restart your router/modem and your Mac : You can do this easily. Simply disconnect the power cable to your router/modem. Wait 30 seconds. Then reconnect. Then restart your Mac. Click the Apple  menu and select Restart .

Renew DHCP Lease : On your Mac, open System Preferences and click on Network . Select the network service you want to connect to (e.g., Wi-Fi or Ethernet) and click on Advanced . This will open a new window. Select the TCP/IP tab and click the Renew DHCP Lease . Then click OK .

Check your connection settings : On your Mac, go to System Preferences > Network . Then select the network that shows this error and click Advanced . Select the TCP/IP tab and then make sure that “Configure IPv4” and “Configure IPv6” are set to Using DHCP and Automatically , respectively.

Then click on the DNS tab, and delete any DNS servers that are listed there. Select them one by one and click on the minus button to remove them. Do not forget to click OK and Apply when you are done.

Create a new network location : On your Mac, open System Preferences and Network . Open the Location drop-down menu and select Edit Locations . Click the plus (+) button and add a new location, give it a name and click Done . Now you have two locations: Automatic and your new location. Select this new location and then click Apply .

Now, we will add a new Wi-Fi or Ethernet service, whichever you are using. Click the plus (+) sign under the network services on the left, select the Interface (Wi-Fi, Ethernet, etc.) and name it, then click Create . Then click Apply .

Now select the Self-Assigned IP network and then click the minus (-) button to delete it. Then click Apply . Does this newly created service connect?

Reset the system firewall: We can do that by deleting its preference file . Open a Finder window and then click Go and Go to Folder from the top menu bar. Enter /Library/Preferences/ and click Go .

Once the Preferences folder is open, find the com.apple.alf.plist file. Delete this file (or place it on your Desktop; if you are not happy with what happens, you can put it back). Then restart your Mac.

Related articles

• How To Reset Network Settings On Mac
• How To Use Network Utility on Mac
• Mac Wi-Fi Connected But No Internet Access
• iPhone Will Not Connect To A Known Wi-Fi Network, Fix

Dr. Serhat Kurt worked as a Senior Technology Director specializing in Apple solutions for small and medium-sized educational institutions. He holds a doctoral degree (or doctorate) from the University of Illinois at Urbana / Champaign and a master’s degree from Purdue University. He is a former faculty member. Here is his LinkedIn profile and Google Scholar profile . Email Serhat Kurt .

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How to fix self-assigned IP address issue on Mac

Table of Contents

Troubleshooting steps for self-assigned ip address issue on mac, understanding the causes of self-assigned ip address on mac, how to reset network settings to fix self-assigned ip address on mac, using terminal commands to resolve self-assigned ip address on mac, tips for preventing self-assigned ip address issue on mac in the future.

If you are experiencing issues with your Mac’s internet connection and have noticed that your IP address is self-assigned, there are a few steps you can take to fix this problem. This issue can occur when your Mac is unable to obtain an IP address from your network’s DHCP server. In this guide, we will discuss the steps you can take to troubleshoot and resolve this issue on your Mac. By following these steps, you should be able to get your Mac connected to the internet again.

Are you experiencing issues with your Mac’s internet connection? Does your network status show a self-assigned IP address? Don’t worry, you’re not alone. This is a common problem that many Mac users face, but luckily, it can be easily fixed. In this article, we’ll guide you through the troubleshooting steps to resolve the self-assigned IP address issue on your Mac.

Firstly, let’s understand what a self-assigned IP address is and why it occurs. An IP address is a unique number assigned to each device connected to a network. It allows devices to communicate with each other and access the internet. In some cases, when your Mac is unable to obtain an IP address from your router or modem, it assigns itself an IP address in the range of 169.254.x.x. This is known as a self-assigned IP address and it indicates a problem with your network connection.

Now, let’s move on to the troubleshooting steps. The first step is to restart your Mac and your router or modem. Sometimes, a simple restart can fix the issue. If that doesn’t work, try resetting your network settings. To do this, go to System Preferences > Network > Advanced > TCP/IP. Click on “Renew DHCP Lease” and then click “Apply.” This will reset your network settings and hopefully, your Mac will be able to obtain a valid IP address.

If the issue persists, the next step is to check your network cables. Make sure they are securely connected to your Mac and your router or modem. If you’re using a wireless connection, try moving closer to your router or modem to see if that improves the connection. You can also try connecting to a different network to see if the issue is with your Mac or your network.

If none of the above steps work, it’s time to troubleshoot your network settings. Go to System Preferences > Network and check if the correct network interface is selected. If you’re using a wired connection, make sure “Ethernet” is selected. If you’re using a wireless connection, make sure “Wi-Fi” is selected. You can also try deleting the network interface and adding it back again. To do this, click on the “-” button at the bottom left corner and then click on the “+” button to add it back.

Another possible solution is to manually assign an IP address to your Mac. To do this, go to System Preferences > Network > Advanced > TCP/IP. Change the “Configure IPv4” option to “Manually” and enter an IP address, subnet mask, and router address. You can obtain this information from your router or modem’s settings. Click “Apply” and see if your Mac is now connected to the internet.

If none of these steps work, it’s possible that there is an issue with your router or modem. Try resetting them to their factory settings and then setting them up again. You can also contact your internet service provider for assistance.

In conclusion, a self-assigned IP address issue on your Mac can be frustrating, but it can be easily fixed by following these troubleshooting steps. Remember to restart your Mac and your router or modem, reset your network settings, check your network cables, and troubleshoot your network settings. If all else fails, try manually assigning an IP address or resetting your router or modem. We hope these steps have helped you resolve the issue and get your Mac back online. Happy browsing!

The most common cause of a self-assigned IP address on Mac is a problem with your network settings. This can happen if your router is not properly configured or if there is a conflict with another device on the network. It can also occur if your Mac’s network settings have been changed or corrupted.

Another possible cause is a faulty Ethernet cable or Wi-Fi connection. If your Mac is unable to establish a stable connection with your network, it may result in a self-assigned IP address. This can happen if the cable is damaged or if there is interference with your Wi-Fi signal.

In some cases, the issue may be related to your internet service provider (ISP). If there is a problem with your ISP’s network or if they are experiencing technical difficulties, it can affect your Mac’s ability to connect to the internet and result in a self-assigned IP address.

Now that we understand the potential causes of this issue, let’s discuss how to fix it. The first step is to check your network settings. Go to System Preferences and click on Network. Make sure that your network connection is set to “Using DHCP” and that the “Renew DHCP Lease” button is clicked. This will force your Mac to request a new IP address from your router.

If this doesn’t work, try resetting your network settings. Go to System Preferences and click on Network. Then, click on the “Advanced” button and select “Renew DHCP Lease” from the TCP/IP tab. This will reset your network settings and may resolve the issue.

If the problem persists, it may be worth trying to reset your router. Unplug your router from the power source and wait for a few minutes before plugging it back in. This will reset your router and may resolve any conflicts or issues with your network.

If none of these solutions work, it may be worth contacting your ISP to see if there are any known issues with their network. They may be able to provide you with further assistance or troubleshoot the issue on their end.

In some cases, the issue may be related to your Mac’s hardware. If you suspect this may be the case, it’s best to take your Mac to an authorized service provider for further diagnosis and repair.

In conclusion, a self-assigned IP address on Mac can be a frustrating issue, but it’s important to understand the potential causes and how to fix it. By checking your network settings, resetting your network, and possibly resetting your router, you can resolve this issue and get back to using your Mac without any interruptions. If the problem persists, don’t hesitate to reach out to your ISP or a professional for further assistance. With a little patience and troubleshooting, you’ll be back online in no time.

Are you experiencing issues with your Mac’s internet connection? Does your network settings show a self-assigned IP address? This can be a frustrating problem, but don’t worry, it can be easily fixed. In this article, we will guide you through the steps to reset your network settings and fix the self-assigned IP address issue on your Mac.

First, let’s understand what a self-assigned IP address is and why it occurs. An IP address is a unique number assigned to each device connected to a network. It allows devices to communicate with each other and access the internet. In some cases, when your Mac is unable to obtain an IP address from your router, it assigns itself an IP address, also known as a self-assigned IP address. This can happen due to various reasons such as network misconfiguration, outdated network settings, or a faulty router.

Now, let’s get to the solution. The first step is to reset your network settings. This will clear any misconfigured settings and allow your Mac to obtain a new IP address from your router. To do this, go to the Apple menu and click on “System Preferences.” Then, click on “Network” and select your active network connection, which will be either Wi-Fi or Ethernet. Next, click on the “Advanced” button at the bottom right corner of the window.

In the advanced settings, click on the “TCP/IP” tab. Here, you will see a drop-down menu next to “Configure IPv4.” Make sure it is set to “Using DHCP.” This means that your Mac will automatically obtain an IP address from your router. If it is already set to DHCP, try switching it to “Using DHCP with manual address” and then back to “Using DHCP.” This will refresh the settings and may fix the issue.

If resetting the network settings did not work, the next step is to renew your DHCP lease. This will force your Mac to request a new IP address from your router. To do this, go back to the “Network” window and click on the “Advanced” button. Then, click on the “TCP/IP” tab and click on the “Renew DHCP Lease” button. Wait for a few seconds and check if your Mac has obtained a new IP address. If it has, the self-assigned IP address issue should be resolved.

If the issue persists, the next step is to delete the network interface and create a new one. This will completely reset your network settings and may fix any underlying issues. To do this, go back to the “Network” window and click on the “Location” drop-down menu. Select “Edit Locations” and click on the “+” button to create a new location. Name it whatever you want and click on “Done.” Then, click on the “-” button to delete your current network interface. Finally, click on the “+” button again to add a new interface and select your active network connection. This will create a new network interface with default settings, and your Mac should now be able to obtain an IP address from your router.

In some cases, the self-assigned IP address issue may be caused by a faulty router. If none of the above solutions work, try restarting your router and modem. If that doesn’t work, try connecting to a different network to see if the issue persists. If it does, then the problem may lie with your Mac’s hardware, and you may need to contact Apple support for further assistance.

In conclusion, a self-assigned IP address on your Mac can be a frustrating issue, but it can be easily fixed by resetting your network settings. We hope this article has helped you resolve the issue and get your Mac back online. Remember to always keep your network settings up to date and regularly restart your router to avoid any future issues. Happy browsing!

Are you experiencing issues with your Mac’s internet connection? Does your network status show a self-assigned IP address? This can be a frustrating problem, but don’t worry, it can be easily fixed using some simple terminal commands. In this article, we will guide you through the steps to resolve the self-assigned IP address issue on your Mac.

First, let’s understand what a self-assigned IP address is and why it occurs. An IP address is a unique number assigned to each device connected to a network. It allows devices to communicate with each other and access the internet. In some cases, when your Mac is unable to obtain an IP address from your router, it assigns itself an IP address in the range of 169.254.x.x. This is known as a self-assigned IP address and it indicates a problem with your network connection.

To fix this issue, we will be using Terminal commands. Terminal is a powerful tool on Mac that allows you to execute commands and perform various tasks. You can access Terminal by going to Applications > Utilities > Terminal or by using the Spotlight search.

Once you have opened Terminal, follow these steps to resolve the self-assigned IP address issue:

Step 1: Release and Renew DHCP Lease The first step is to release and renew your DHCP lease. DHCP (Dynamic Host Configuration Protocol) is responsible for assigning IP addresses to devices on a network. To release your DHCP lease, type the following command in Terminal and press Enter: sudo ipconfig set en0 DHCP

This command will prompt you to enter your administrator password. Type your password and press Enter. This will release your current DHCP lease. Now, to renew your DHCP lease, type the following command and press Enter: sudo ipconfig set en0 BOOTP

Step 2: Flush DNS Cache The next step is to flush your DNS cache. DNS (Domain Name System) is responsible for translating domain names into IP addresses. Sometimes, a corrupted DNS cache can cause network issues. To flush your DNS cache, type the following command and press Enter: sudo dscacheutil -flushcache

Step 3: Restart Network Interfaces Now, we will restart the network interfaces on your Mac. This will reset your network settings and hopefully resolve the self-assigned IP address issue. Type the following command and press Enter: sudo ifconfig en0 down && sudo ifconfig en0 up

Step 4: Renew DHCP Lease Again After restarting the network interfaces, we will renew our DHCP lease again. Type the following command and press Enter: sudo ipconfig set en0 DHCP

Step 5: Check Network Status Finally, let’s check the network status to see if the issue has been resolved. Type the following command and press Enter: ifconfig en0

If your network status now shows a valid IP address, congratulations, you have successfully resolved the self-assigned IP address issue on your Mac!

In some cases, the above steps may not work and you may still see a self-assigned IP address. In such a scenario, you can try resetting your router or contacting your internet service provider for assistance.

In conclusion, a self-assigned IP address can be a frustrating issue, but it can be easily fixed using some simple terminal commands. By releasing and renewing your DHCP lease, flushing your DNS cache, and restarting your network interfaces, you can resolve this issue and get back to using your Mac without any network problems. We hope this article was helpful and you were able to successfully fix the self-assigned IP address issue on your Mac. Happy browsing!

If you’re a Mac user, you may have encountered the frustrating issue of a self-assigned IP address. This occurs when your Mac is unable to connect to the internet and instead assigns itself an IP address, usually starting with “169.” This can be a major inconvenience, especially if you rely on your Mac for work or school. But fear not, there are steps you can take to fix this issue and prevent it from happening in the future.

First and foremost, it’s important to understand why this issue occurs. In most cases, it’s due to a problem with your network settings. This could be caused by a recent software update, a change in your network configuration, or even a faulty network cable. Whatever the reason may be, the good news is that it can be easily fixed.

The first step in fixing a self-assigned IP address issue is to reset your network settings. To do this, go to the Apple menu and select “System Preferences.” From there, click on “Network” and then select your network connection (usually Wi-Fi or Ethernet). Next, click on the “Advanced” button and then select the “TCP/IP” tab. Finally, click on the “Renew DHCP Lease” button. This will reset your network settings and hopefully fix the issue.

If resetting your network settings doesn’t work, the next step is to check your network hardware. Make sure all cables are securely connected and that your router or modem is functioning properly. You may also want to try restarting your router or modem to see if that resolves the issue.

Another potential solution is to manually assign an IP address to your Mac. To do this, go back to the “TCP/IP” tab in your network settings and select “Manually” from the “Configure IPv4” drop-down menu. Then, enter an IP address, subnet mask, and router address that are appropriate for your network. You can usually find this information by checking your other devices that are connected to the same network. Once you’ve entered the information, click “Apply” and then try connecting to the internet again.

If none of these solutions work, it may be time to contact your internet service provider (ISP). They may be experiencing network issues or there could be a problem with your account. It’s always a good idea to check with your ISP before trying any other troubleshooting steps.

Now that you’ve fixed the self-assigned IP address issue on your Mac, you may be wondering how to prevent it from happening again in the future. The best way to do this is to regularly update your Mac’s software. Apple releases updates that often include bug fixes and improvements to network connectivity. By keeping your Mac up to date, you can prevent potential issues from occurring.

Another tip for preventing self-assigned IP address issues is to regularly restart your network hardware. This includes your router, modem, and any other devices that are part of your network. By restarting these devices, you can clear out any temporary network issues and ensure that everything is functioning properly.

In addition, it’s important to regularly check your network settings and make sure they are configured correctly. If you make any changes to your network, be sure to update your Mac’s settings accordingly. This will help prevent any conflicts or issues with your network connection.

In conclusion, a self-assigned IP address issue on your Mac can be frustrating, but it can be easily fixed by resetting your network settings, checking your network hardware, or manually assigning an IP address. To prevent this issue from happening in the future, make sure to regularly update your Mac’s software, restart your network hardware, and check your network settings. By following these tips, you can ensure a smooth and uninterrupted internet connection on your Mac.

1. What is a self-assigned IP address issue on Mac? A self-assigned IP address issue on Mac occurs when the computer is unable to connect to the internet due to an incorrect or unavailable IP address.

2. How can I check if I have a self-assigned IP address issue on my Mac? To check for a self-assigned IP address issue on your Mac, go to System Preferences > Network > Wi-Fi (or Ethernet) > Advanced > TCP/IP. If the IP address is listed as “169.254.x.x”, then you have a self-assigned IP address.

3. What are the possible causes of a self-assigned IP address issue on Mac? A self-assigned IP address issue on Mac can be caused by a variety of factors, such as network misconfiguration, faulty network hardware, or conflicts with other devices on the network.

4. How can I fix a self-assigned IP address issue on my Mac? To fix a self-assigned IP address issue on your Mac, you can try resetting your network settings, restarting your router, or renewing your DHCP lease. If these methods do not work, you may need to contact your internet service provider for further assistance.

5. Can I prevent a self-assigned IP address issue from happening on my Mac? Yes, you can prevent a self-assigned IP address issue on your Mac by regularly updating your network settings, ensuring that your network hardware is functioning properly, and avoiding conflicts with other devices on the network. It is also recommended to use a reliable and secure internet connection.In conclusion, fixing a self-assigned IP address issue on a Mac can be done by troubleshooting the network settings, resetting the network configuration, or renewing the DHCP lease. It is important to also check for any software or hardware conflicts that may be causing the issue. By following these steps, the self-assigned IP address issue can be resolved and the Mac can connect to the network properly. It is recommended to seek further assistance from a professional if the issue persists.

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Fix self-assigned IP addresses in OS X

One common issue that has affected OS X systems is when network interfaces are issued a self-assigned IP address. Here is how to address this problem.

One common issue that has affected OS X systems is when network interfaces are issued a self-assigned IP address, even though the system is connected to a network with a properly configured DHCP server. When this happens, other systems on the same network (often including similarly configured Macs) will be working just fine, indicating the problem lies with the Mac's configuration and is not a compatibility issue with the networking hardware.

Often when I encounter this issue, I find that people have recently made a relatively major configuration change to their systems, either by updating their OS version, performing an upgrade to another major release of OS X, migrating to a new system, or have just restored their systems from backup. Initial attempts to address the problem include creating new network locations to refresh the network port configurations, or manually refresh the DHCP lease to force a reconfiguration for the port. While these are good attempts, many times they do not fix the problem.

The reason OS X issues self-assigned IP addresses is to allow a network interface to create an ad-hoc network if needed, without the presence of an established network. However, this is only done if the network port detects a proper hardware connection but cannot communicate with the DHCP server to obtain an IP address. Usually the main culprit for this is configuration problems with the system's firewall.

When people perform major configuration changes to their systems, sometimes the settings may not migrate properly. One that seems particularly vulnerable to odd problems is the system firewall. Luckily the fix is a relatively easy one; all you have to do is remove the firewall's preferences and then reboot the system.

To reset the firewall, go to the /Macintosh HD/Library/Preferences/ folder and remove the file called "com.apple.alf.plist," and then restart your computer. After the system boots, you may be prompted to allow incoming connections to numerous programs and services, so accept these for now (you can always go to the Firewall settings and deny or remove entries later on) and then try connecting to the network again. While configuration changes from migrating or restoring a system can lead to this problem, at other times major system crashes or power outages can do the same.

Questions? Comments? Have a fix? Post them below or e-mail us ! Be sure to check us out on Twitter and the CNET Mac forums .

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How To Fix Internet Not Working Due To Self-Assigned IP Address Issue

If your Mac is connected to a working Wi-Fi network but the Internet is still not working, then we have got the solution for you. A lot of times your Mac is issued a self-assigned IP, which causes the Internet to not work on the machine.

Despite the same Wi-Fi network working on other devices, the Mac will simply show no internet connection error and Internet will not work on it. In these situations Wi-Fi has the self-assigned IP address and will not connect to the Internet despite the Internet working on other devices.

On Mac’s Wi-Fi page the Wi-Fi will also show the Self-Assigned IP Address text instead of connected. This is a very annoying problem that can cause Internet to not work on your Mac. Not having a working Internet connection on your Mac due to Mac’s self assigned IP problem can prevent you for doing work and render your Mac useless.

Good thing is self-assigned IP issue on Mac is quite easy to solve. You can fix the self-assigned IP address issue and get the Internet to work again on your Mac by simply deleting a few files on your machine.

Simply follow the steps below from an administrator account and put the mentioned files in trash.

This solution works on all recent versions of macOS including macOS Ventura, macOS Monterey, macOS Big Sur and macOS Catalina.

Fix Self-Assigned IP Address Issue on Mac

You can use to solve the self-assigned IP address issue on your Mac running macOS Ventura, macOS Monterey, macOS Big Sur, macOS Catalina etc.

1. On your Mac launch finder and click on Macintosh HD. (Don’t see Macintosh HD? See here )

2. Click on the Library folder and go to Preferences.

3. Now click on the SystemConfiguration folder.

4. Next put the following files in trash.

• com.apple.airport.preferences.plist
• com.apple.network.identification.plist
• NetworkInterfaces.plist

5. Restart your Mac.

Once the reboot has taken place the Internet will start working and self assigned IP address issue will be resolved.

If you don’t see all the files mentioned above, then just delete the ones that are present and reboot your machine.

How to Reset Mac’s IP address

In case you’re looking to reset your Mac’s IP address to solve internet connection problems with your computer, then the following instructions will help. If deleting the files mentioned above does not help, then the steps to reset Mac IP address can also prove helpful in fixing self-assigned IP Mac problem.

On macOS Ventura or later

Below you can find instructions on how to reset Mac IP address if you are running macOS Ventura or later.

1. Click on the Apple logo from the top menu bar and then click on System Settings .

2. Now click on Wi-Fi option from the side pane.

3. Make sure your Mac is connected to your Wi-Fi network. Then click on ‘ Details… ‘ located next to Wi-Fi’s name.

4. Now click on TCP/IP button from the left side pane.

5. Next find the ‘ Renew DHCP Lease ‘ button on the right side of the window and click on it.

6. Click on OK button and using the toggle next to Wi-Fi turn off Wi-Fi and turn it back on after a few seconds.

By performing these steps you should be able to solve self-assigned IP issue on your Mac and Internet should start working once again.

On macOS Monterey or earlier

Here’s how you can reset Mac IP address if you are running macOS Monterey or earlier on your Mac.

1. On your Mac open System Preferences.

2. Click on Network icon.

3. Make sure Wi-Fi is selected from the side pane and then click on ‘Advanced’ button.

4. Now click on TCP/IP from the top navigation bar.

5. Next click on ‘Renew DHCP Lease’ button.

6. Click OK to exit and from the top menu click on the Wi-Fi button and turn off Wi-Fi.

7. After a few seconds turn Wi-Fi back on and connect your Mac to your Wi-Fi network.

8. At this point Self-Assigned IP address issue should get solved and Internet should start working again.

There you have it, this is how you can easily and quickly fix Self-Assigned IP address issue on Mac and get your Internet connection working once again. If you have any questions regarding this tutorial, then feel free to let us know in the comments section below.

• troubleshooting

Hello I recently instakked BIG SUR on my late 2013 macbook pro and I am having trouble tethering my Iphone XR to it. I can tether using wifi, but when I attempt to tether using bluetooth, my phone shows as connected in bluetooth preferences on my macbook and iphone, with the connection/link symbol shown on my iphone, but the internet will not work. In Network the bluetooth Pan shows an orange dot, STATUS: CONNECTED, but underneath it says ‘internet-not-working-self-assigned-ip-address-issue’. Do you have any ideas on how to fix this, I followed your instructions from the link ( https://ioshacker.com/how-to/fix-internet-not-working-self-assigned-ip-address-issue ) on your website, but each time I restart the computer the files that I put into the trash and delete from the trash re-appear in the system configuration folder. Only 2 of the 3 files you suggested to trash are in the folder, – com.apple.network.identification.plist – is not in the folder. Any advice appreciated.

I’m running Monterrey on my MacBook Pro and was having problem with the self-assigned IP and cannot connect to the Internet. I followed what your article suggested, several times, but was still unable to resolve the problem. Are there other suggestions that you think I should try? Thank you.

I just had the same issue and none of the fixes found online worked. I have McAfee Security software installed and there was a service running called McAfeeSystemExtensions. I deactivated the service within the Network settings and problem resolved.

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Self-Assigned IP Address Error on Mac: How to Fix?

By: Waseem Patwegar

If Wi-Fi or Ethernet is not working on your MacBook due to “Self-Assigned IP Address” error, you can find below the steps to restore network connectivity on your Mac.

Self-Assigned IP Address on Mac

In a typical case of this nature, the MacBook appears to be connected to the Network (WiFi or Ethernet), but it fails to load webpages and comes up with “Self-Assigned IP” error.

As indicated by the wordings (Self-Assigned IP Address), the reason for this problem is due to your Mac Assigning itself an IP Address that is not valid or not recognized on the network.

Luckily, in most cases the problem of No Internet connectivity due to “Self-Assigned IP Address” can be fixed by rebooting the modem.

1. Power Cycle Modem/Router

Before going ahead with other methods, simply disconnect the Modem/Router from its power supply source > wait for 60 seconds and reconnect the Modem/Router back to its power supply.

After this, you should find internet working properly on your Mac, as it starts using a valid IP Address on both WiFi and Ethernet to connect to the network.

2. Renew DHCP Lease

1. Click on Apple Logo in the top menu-bar and select System Preferences… in the drop-down menu.

2. On System Preferences screen, click on the Network Icon.

3. On Network screen, select your Network ( Ethernet or WiFi ) in the side-menu and click on Advanced .

4. On the next screen, switch to TCP/IP tab and click on Renew DHCP Lease button.

5. Click on OK to save the revised settings.

After the DHCP lease is renewed, you should be able to connect to internet

3. Delete PLIST Files

The problem of No Internet on Mac due to Self-assigned IP Address can be fixed by removing certain files related to network connectivity on your computer.

1. Click on the Finder Icon in taskbar > click on the Go tab in top-menu bar and select Go to Folder option in the drop-down menu.

2. In Go-to window, Type /Library/Preferences/SystemConfiguration/ and click on the Go button.

4. In System Configuration folder, delete the following folders (right-click on the Folders and move them to trash).

• com.apple.airport.preferences.plist
• com.apple.network.identification.plist
• NetworkInterfaces.plist
• Preferences.plist

Note: Your Mac will automatically recreate above Folders when it restarts.

5. Shutdown the MacBook > Wait for 30 seconds and Restart the Mac again and see if you can now connect to the internet.

4. Set Service Order

Make sure that your MacBook is always connecting to your preferred network type (WiFi or Ethernet).

1. Click on Apple Logo > System Preferences > Network > On the Network screen, click on the Gear icon and select Set Service Order option in the drop-down menu.

2. On Service Order window, drag your preferred Network (WiFi or Ethermet) to the top position.

3. Once you are done, click on OK to save the changes.

5. Create New Network Location

If you are still unable to connect to Internet, create a New Network Location on your Mac and renew its DCHP lease.

1. Click on Apple Logo > System Preferences > Network > On the Network screen, open the Location menu and select Edit Locations option.

2. On the next screen, click on the Plus icon to Add New Location.

3. On the next screen, type a Name for the New Network Location and click on Done .

4. After creating new location, select either WiFi or Ethernet in the side menu and click on Advanced .

5. On the next screen, switch to TCP/IP tab and click on Renew DHCP Lease .

6. Click on OK to save the new settings.

This should certainly fix “Self-Assigned IP Address problem and restore network connectivity on your Mac.

6. Switch to Google DNS

If your Mac is frequently struggling from Network connectivity issues, the problem might be due to the DNS Servers of your Internet Service provider being busy and clogged up.

To fix this issue, you can consider switching the DNS servers on your Mac to Google DNS or Open DNS.

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How To Fix Self-Assigned IP Addresses In Mac OS X [Video How-To]

By Michael Steeber • 6:06 am, March 5, 2011

Not being able to get online can be a frustrating problem. It can cost hours of time and test your patience. See, Mac OS X doesn’t always work properly all of the time, and will occasionally assign itself an IP address, which will result in you being unable to connect to the internet. Luckily, there is an easy solution. You can use System Preferences to set a new Network Location, as well as renew your DHCP lease to fix the problem. This video will show you how to quickly fix the problem of self assigned IP addresses through System Preferences.

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How to Fix Self-Assigned IP Address Issue on Mac

If you're a Mac user, you may have encountered the frustrating self-assigned IP address issue at some point. This problem can disrupt your internet connectivity and make it challenging to stay connected. Fortunately, there are several methods to resolve this issue, and We'll walk you through each step.

What Is a Self-Assigned IP Address?

Before we dive into the solutions, let's understand what a self-assigned IP address is. When your Mac can't obtain an IP address from your network router or DHCP server, it assigns itself an IP address. This address typically falls in the range of 169.254.x.x and is often referred to as a "self-assigned" or "APIPA" address.

Troubleshooting Steps

1: Restart Your Mac and Router

The first and simplest solution is to restart your Mac and your router. Sometimes, a temporary glitch can cause the self-assigned IP address problem. By restarting both, you can refresh the network configuration and potentially resolve the issue.

2: Check Ethernet and Wi-Fi Connections

Ensure that your Ethernet or Wi-Fi cable is securely connected to your Mac and router. Loose connections can lead to network problems, including self-assigned IP addresses.

3: Renew DHCP Lease

To force your Mac to request a new IP address from the router, follow these steps:

1.      Go to "System Preferences."

2.      Select "Network."

3.      Choose your active network connection (Ethernet or Wi-Fi).

4.      Click on "Advanced."

5.      Navigate to the "TCP/IP" tab.

6.      Click "Renew DHCP Lease."

4: Reset Network Settings

If renewing the DHCP lease doesn't work, you can reset your network settings. Keep in mind that this will remove all custom network configurations, so be prepared to re-enter them.

3.      Choose your active network connection.

4.      Click "Advanced."

7.      Click "OK" to confirm.

5: Create a Custom Network Location

Sometimes, creating a custom network location can help resolve IP address issues.

3.      Click the gear icon at the bottom left and choose "Duplicate Location."

4.      Name the new location.

5.      Configure your network settings for this new location.

6.      Apply the changes and select the new location from the network settings.

6: Reset the NVRAM/PRAM

Resetting the NVRAM (Non-Volatile Random-Access Memory) or PRAM (Parameter RAM) can reset various hardware settings, including network configurations.

1.      Shut down your Mac.

2.      Turn it back on and simultaneously press and hold the Option, Command, P, and R keys.

3.      Hold these keys for about 20 seconds and then release them.

7: Update macOS

Outdated macOS versions can sometimes cause network issues. Ensure your Mac is running the latest version of macOS by checking for updates in the " SoftwareUpdate " section of "System Preferences."

Advanced Solutions

Using Terminal Commands

If you're comfortable with Terminal commands, we'll show you some advanced tricks to troubleshoot the self-assigned IP address issue.

Update Your Mac's Operating System

Outdated software can sometimes lead to connectivity problems. We'll guide you on how to update your Mac to the latest version of macOS.

Contacting Your Internet Service Provider

If all else fails, it might be time to get in touch with your internet service provider. We'll discuss when and how to do this effectively.

Dealing with a self-assigned IP address on your Mac can be frustrating, but it's a problem that can be solved. By following these troubleshooting steps, you can get your Mac back online and enjoy uninterrupted internet connectivity.

For more Mac-related tips and tricks, stay tuned to our blog.

  FAQs

Q: Why did my Mac assign itself a self-assigned IP address?

A: Your Mac assigns itself a self-assigned IP address when it cannot obtain one from the network router or DHCP server. This can happen due to network configuration issues or temporary glitches.

Q: Is it safe to reset my network settings?

A: Resetting network settings will remove custom configurations but is generally safe. Just be prepared to re-enter your network details.

Q: Do I need to reset my NVRAM/PRAM often?

A: No, resetting NVRAM/PRAM should only be done when troubleshooting specific hardware or network issues.

Q: What if these steps don't work?

A: If the problem persists, consider contacting Apple Support or your network administrator for further assistance.

Q: Can I prevent self-assigned IP address issues in the future?

A: Keeping your Mac and router firmware up to date and ensuring proper network cable connections can help prevent self-assigned IP address problems in the future.

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Use DHCP or a manual IP address on Mac

An Internet Protocol (IP) address is a number that identifies each computer across the internet or a network. When you connect to the internet or an IP network, your computer needs an IP address.

Your IP address can be provided in two main ways:

Automatically: Your computer is assigned an address using Dynamic Host Configuration Protocol (DHCP).

Manually: Your ISP or network administrator gives you an IP address, and you enter it in Network settings.

Follow these steps to enter your IP address or have it assigned automatically.

Open Network settings for me

Click the network connection you want to use on the right, then click Details.

Click TCP/IP.

Click the Configure IPv4 pop-up menu, then choose an option:

If your address is assigned automatically, choose Using DHCP.

If your ISP or administrator gave you an IP address, choose Manually, then enter the address in the IP address field. If your ISP gave you additional information such as the subnet mask and router, enter those values in the labeled fields.

Note: Most IP addresses are IPv4 addresses, which look like a series of numbers separated by three periods, similar to this: 123.45.67.89. If you received an IP address that’s a longer series of numbers and letters, divided by seven colons (for example, fa80:0000:0000:0123:0203:93ee:ef5b:44a0), it’s a different type of IP address called IPv6. To enter an IPv6 address, click the Configure IPv6 pop-up menu, choose Manually, then enter your IPv6 address.

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Getting a self assigned IP address in Mac OS X 10.10 (Yosemite) on a Mac Mini

I have had a situation where I cannot access the internet and the network preferences list ethernet interface connected to DSL modem has self assigned IP address and cannot connect. It is set to connect via DHCP.

I Googled this problem and the instruction was to remove a file called com.apple.alf.plist from /Library/Preferences and then reboot.

I did this and the interface to the DSL shows that it is connected but I still cannot get to remote sites.

One probable cause of the (DHCP) self assigned IP address issue might have been a system upgrade or a crash or other significant event but there has been nothing like that.

I have been playing with the ethernet cables and now the preferences list the interface as having a self assigned ip address again.

EDIT: This machine has the internet connection to the built in ethernet port and a local network connection via usb/ethernet interface. I switched the internet connection to the USB/Ethernet interface via DHCP and I can now get to the Internet, and I can’t get to other hosts running on local network (now connected via built in ethernet port). I suspect that the built in ethernet port has a hardware problem).

• I want local network isolated from internet connected local network
• I am not looking for this machine to serve as a gateway from one network to another.
• The built in ethernet port/interface is not working properly
• I have removed the com.apple.alf.plist file from /Library/Preferences and rebooted with no improvement, accept the "self assigned IP address" status doesn’t show and the Ethernet interface indicates that it is connected, but doesn’t send or receive anything.
• I ran AHT (Apple Hardware Test) and nothing in the way of hardware was found to malfunction.
• I have another USB/Ethernet interface and am using that in lieu of using the built in ethernet port/interface. Both USB/ethernet interfaces work fine.

I know how to set interfaces with static private ip addresses, as well as using preferences to specify dchp. My ISP’s DSL modem is expecting interfaces on local hosts to use DCHP.

• 1 First, lets simplify things: [START] You have a computer with OSX. It has a Ethernet port which is set to be configured via DHCP. The port gets a link but the DHCP req fails [END]. It gets a link so the cables are fine. All the rest is fluff except for what you alraady tried. Next thing to try: 1a) Do other computers work via DHCP (aka is it you OSx install acting up or the DHCP server in the router). 1B) if you lack another computer, what happens when you configure en0 with a static IP and netmask on the same network as your router. Are you able to ping your gateway IP? –  Hennes Jul 13, 2016 at 18:43
• 1 Test 2) What happens if you open a shell, bring en0 down (ifconfig en0 down?) and try a dhcp req on that? (guessing ipconfig set en0 DHCP based on superuser.com/questions/86956/… ). –  Hennes Jul 13, 2016 at 18:45
• PS: I saw your edit by I fail to parse it. What does " This machine has the internet connection to the built in ethernet port" mean? The Ethernet port is a *p8C plug. –  Hennes Jul 13, 2016 at 18:48
• @Hennes - fair start but actually I think the OP is trying to get throughput from one NIC to the other - which is not going to happen that way without tech-level work. Simple fix would be "buy an ethernet switch & plug everything into that", I think. –  Tetsujin Jul 13, 2016 at 18:52
• @OP: can you check these two posts: superuser.com/questions/717629/… superuser.com/questions/450493/… –  Hennes Jul 13, 2016 at 19:00

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