Mac OS Catalina - Wifi not turning ON

I had this exact same problem. I rebooted, still no wifi. The solution was to reset the pram. Restart again and hold down Command + Option + P + R (the keys P and R, doesn't have to be upper case). Make sure you hear the starting chime more than once and don't let go of those keys until you hear it chime. I did 3 or 4 times just to be sure. When it woke up, the wifi was back on.

Hello unais94!

Thanks for reaching out to the Apple Support Communities. I see from your message that you’re having an issue with the Wi-Fi being turned off since upgrading to macOS Catalina. I’d like to be sure that you’ve covered all the basics. Take a look at the information in this article: Manage the Wi-Fi connection on your Mac. 

Be sure to follow the steps under the section “Turn Wi-Fi on or off.” If you’re unable to turn the Wi-Fi on from the current Wi-Fi network shown in the screenshot you provided, try creating a new one using the information for your current Wi-Fi network you’re trying to connect to. 

If you’re still unable to get the new Wi-Fi network to turn on, Contact Apple Support for more assistance.

Cheers

i have the same problem on my MacBook Air late 2015. I Cant't create a new wifi network either!!! I don't know what to do.

pls have a patch or something to repair this.

is it possible to return back to Mojave?

Yes it is possible to return to Mojave. You need a USB stick and a wired internet connection. Use the instructions here: https://support.apple.com/en-ca/HT201372

I just did this on my 2014 13" Macbook and WIFI now works. (Apple store was unable to fix the issue on Catalina)

What I did was I booted up my computer in safe mode. While turning on hold shift. Still had the same problem. But then turned off completely, not restart, and it fixed it. See if that works. If not reply to this

If you don't know the answer stay of the forums.

Possible workaround here – it seems that Apple didn't include the driver for a specific WiFi chip in Catalina…

I guess Apple didn't like it…

https://discussions.apple.com/thread/250720965?answerId=251575762022#251575762022

That link for possible workaround gives me a access denied error, for some reason. Can you please post a solution or a brief here? Thanks a ton.

Reference:

Hey did you figure this out. I'm having the same problem. Just the same. Updated and then the next day had the problem with the wifi. HELP!!!!

Hey - I’m having the exact same issue. Have you managed to resolve your problem? Thanks

This worked when I had no safari, chrome or iCloud

System Preferences > Network > and create a new Network Location (Where it says Automatic) and to re-join a known working wi-fi network.

Hello unais94!

Based upon the results, and the Wi-Fi still not working after 6 days, the next step is to Contact Apple Support for more assistance.

Enjoy the day!