WiFi only works with Ethernet plugged in

iMac running Ventura, Apple Base Station, Verizon FIOS router. After losing power twice in 20 minutes during a storm 2 days ago, my iMac's WiFi stopped working altogether...unless I connect it via Ethernet cable to the Base Station. Of course, at that point I don't need the WiFi because...Ethernet connection (so in fact, I'm not sure the WiFi is doing anything on the iMac). Seems to me something has gotten scrambled in the iMac. A MacBookPro and MacBookAir are both connecting via WiFi without a hitch. Wondering if anyone's dealt with this situation or if it's time for the iMac to visit the shop.

-gf

Posted on Aug 10, 2023 11:38 AM

Top-ranking reply

rkaufmann87

Level 10

148,470 points

Posted on Aug 11, 2023 1:04 PM

There is your problem, having Avast AV installed. Mac OS does not require nor does it benefit in any fashion by adding third party

Antivirus apps
Cleaning apps
Security apps
VPN apps
maintenance apps

These types of apps have the exact opposite effect you want, they make Mac OS slow, unstable, appear buggy (much like you are experiencing) and offer NOTHING in return except to help empty your wallet. Malwarebytes is okay and was developed by a trusted developer and participant of these forums. While you likely don't need Malwarebytes it is not harmful and if you do download something like adware it can assist by removing it.

Please locate the developers uninstall procedure from Avast and follow it to the letter. After you hav e executed that, please restart the computer in Safe Mode and then restart normally.

In order to keep your Mac secure and stable simply keep Mac OS up-to-date and restart the computer about once every week or two. Other than that, please leave Mac OS alone!

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WiFi only works with Ethernet plugged in

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