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Ethernet Internet Connection Unreliable with Catalina

It was no easy task, but I set up my home network so that I would be able to connect via ethernet from my 2nd floor home office even though my modem & router are downstairs. For some reason since updating to Catalina, the LAN connection is extremely unreliable, and more often than not... actually it doesn't seem to be intermittent anymore - it is now always showing a yellow light & says "USB 10/100/1000 LAN has a self-assigned IP address and will not be able to connect to the Internet".


I've tried a number of troubleshooting steps, but none have had any effect.


I have an older Mac Mini connected in this same fashion with the exact same settings, the only difference being that the Mini is running High Sierra and doesn't have any problem connecting via ethernet.


Any suggestions welcome & appreciated.


MacBook Pro 13″, macOS 10.15

Posted on Sep 29, 2020 9:59 AM

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Question marked as Top-ranking reply

Posted on Sep 29, 2020 10:22 AM

Hi, welcome to the Apple Users Community.


Please try this link for help with your issue

https://support.apple.com/guide/mac-help/use-dhcp-or-a-manual-ip-address-on-mac-mchlp2718/10.15/mac/10.15


Also make a note of the network settings used on your Mac Mini and I'm sure you know to ensure the IP addresses do not clash.


What CAT and type of Ethernet cable are you using, patch or crossover? It should be a patch cable.


Best of luck

1 reply
Question marked as Top-ranking reply

Sep 29, 2020 10:22 AM in response to adamfromtempe

Hi, welcome to the Apple Users Community.


Please try this link for help with your issue

https://support.apple.com/guide/mac-help/use-dhcp-or-a-manual-ip-address-on-mac-mchlp2718/10.15/mac/10.15


Also make a note of the network settings used on your Mac Mini and I'm sure you know to ensure the IP addresses do not clash.


What CAT and type of Ethernet cable are you using, patch or crossover? It should be a patch cable.


Best of luck

Ethernet Internet Connection Unreliable with Catalina

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