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

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Level 1

33 points

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.

Veronica

Australia

iMac 27", macOS 10.15

Posted on Mar 21, 2020 7:21 PM

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Answer 1

Top-ranking reply

BDAqua

Level 10

245,183 points

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

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...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

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Answer 2

rayver Author

Level 1

33 points

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.

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Answer 3

rayver Author

Level 1

33 points

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

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Answer 4

BDAqua

Level 10

245,183 points

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?

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.

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Answer 5

BDAqua

Level 10

245,183 points

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?

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

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