Why am I getting a no hardware installed error after upgrading to macOS Mojave?

[malandro]

Hi guys

I recently upgraded from High Sierra to Mojave on my 2013 15" Macbook Pro . For the first two days everything was fine. Then on the third day the Wi-Fi stopped working as if there wasn't any Wi-Fi card installed. I took the MacBook to the Apple store, and they turned it on, wifi worked fine. Tech did some tests and told me everything is fine. Got home, turned it on, "no hardware installed". I google it and I learned how to do NVRAM & SMC Resetting. Did those, worked again. Few days later, stopped working again. Did the NVRAM & SMC Resetting again, and it worked again. Two weeks later I got to the point where I needed to do the NVRAM & SMC Resetting every time I turned on the MacBook. Since yesterday, resetting doesn't work anymore and I can't get wifi to work. Tried 20 times today and can't get it back. Any help would be appreciated. Thank you

 

[Just_Me_D]

Re: "Wi-Fi : No hardware installed" after upgrade to MacOS Mohave

Please be careful to not post serial numbers and other important information.

With that being said, I would try reinstalling macOS Mojave to see if that fixes the problem for you.

 

[malandro]

Re: "Wi-Fi : No hardware installed" after upgrade to MacOS Mohave

Please be careful to not post serial numbers and other important information.

With that being said, I would try reinstalling macOS Mojave to see if that fixes the problem for you.

No. That doesn't work

 

[Just_Me_D]

Re: "Wi-Fi : No hardware installed" after upgrade to MacOS Mohave

No. That doesn't work

Did you try or are you saying that you don’t want to reinstall Mojave?

 

[malandro]

Re: "Wi-Fi : No hardware installed" after upgrade to MacOS Mohave

Did you try or are you saying that you don’t want to reinstall Mojave?

I did reinstall Mojave. No change. Now I am trying to downgrade back to High Sierra

 

[malandro]

When I try to reboot the computer using Shift-Option/Alt-Command-R to downgrade to High Sierra I get this :

 

[malandro]

When I reboot în option + power the wifi works. If I reboot normally, I get the x and the "no hardware installed" message