Mac OS 12.3 Breaks My Wifi

serversnake Said:

"Mac OS 12.3 Breaks My Wifi: Updated to 12.3 the other day. Using the m1max macbook pro. Wifi became completely unstable. [...]Restored the macbook to a backup with 12.0.: Wifi works as normal..."

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Report this to Apple:

Do your Part: Inform Apple of this update occurrence. Apple wont get back to you directly, but the more feedback thy receive from its users, the more likely they will know what needs to be fixed.

1. Go Here: Feedback - macOS - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Select: "Software/Firmware Update" for the "Feedback Area"
4. Comment: that this all started after an update. Include the URL of this post in your port.
5. Proceed from there as necessary.

Open system preferences, then Network, then select WiFi and then delete your WiFi from the MacBook. If the issue still happens, contact your internet provider or this article might help:

If your Mac isn't connecting to the internet over Wi-Fi - Apple Support

I'd suggest that you get a WiFi scanner for your phone and then search the WiFi channels being used by your neighbors. WiFi routers typically come configured for a common channel which means that your neighbor(s) could be using the same channel. This is like a party line (only old people will know about this LOL) where everyone is trying to talk over the same line. Your router has to deal with competition from your neighbors and this can kill your speed. Google for tips on selecting the right WiFi channel on your router to see if that could be your problem. Moving your WiFi channel to one with less interference can greatly speed up the transfer rate and minimize retransmissions when collisions occur.

Plug your MBP into your router via Ethernet and update your system to 12.4. Then switch back to WiFi and see if it is any more stable.