The WiFi on my MacBook Pro Unibody Mid 2012 15'' stopped working a few weeks ago and shows "Wi-Fi: no hardware installed". After searching online, I found this post here MacBook is displaying the message "no hardware installed" when I click on Wi-Fi and here Bluetooth and wifi stopped working
Now, here is the problem.
When the WiFi stopped working a few weeks ago, the bluetooth also stopped working. So both the WiFi and bluetooth did not work. Then, I ordered a replacement WiFi cable because I thought that the issue could come from there, and then I followed the steps here https://www.youtube.com/watch?v=tg5gNop2Cos&ab_channel=GRIBSOFT to replace the old WiFi cable. Surprisingly, the Bluetooth started working again, but the WiFi still showed "Wi-Fi: no hardware installed". I then ordered a second WiFi cable from a different seller, and again replaced the cable. But the outcome is still the same, the bluetooth works but the WiFi not.
After searching online, and like the post above MacBook is displaying the message "no hardware installed" when I click on Wi-Fi says, the issue could come from the Airport Card. Before ordering one, what I don't understand is: if the issue could be due to the Airport Card, how is it possible that the bluetooth works again after replacing the WiFi cable ? I even put back the old WiFi cable, and when I did, the bluetooth stopped working again. So the bluetooth works with the two new replacement WiFi cables I ordered, but not with the original cable. And the WiFi doesn't work at all with any cable.
This seems really strange to me. Either the issue comes from the Airport card, and then the bluetooth should not be working when the WiFi cable is replaced, or the issue comes from the WiFi cable, but then the WiFi should be working again after replacing the cable.
By the way, I tried any other way I found on the Internet, including resetting NVRAM and SMC, removing NetworkInterfaces.plist, reinstalling OS X, Apple Hardware Test and other possible fixes I found online. Nothing worked. So if the issue really comes from the Airport cable, how do you explain that ? If it doesn't come from there, and the above fixes didn't work, what else could it possibly be ?
I haven been searching for several hours, but did not find any explanation on this, so I thought I might as well ask. Thank you so much for your help