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Level 1

89 points

Wi-Fi connection but no ethernet

iMac with High Sierra. I've tried everything under the sun to get the ethernet connection again. Restart computer, restart modem, etc. Finally I chatted with a Comcast tech guy for an hour. He ran diagnostics, reset the modem, and more. He finally concluded that the problem might be the ethernet cable. I replaced it. (I ordered an ethernet-USB adapter, but I'm not optimistic.) Still no connection. I've never had this problem during the nine years I've had this iMac, until several days ago. Any suggestions?

Posted on Jun 24, 2020 8:14 AM

Best reply

BDAqua

Level 10

239,375 points

Posted on Jun 24, 2020 9:30 AM

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.

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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Wi-Fi connection but no ethernet

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