Internal MacBook Wi-Fi only working after Safe Boot I am having very strange issues with my MacBooks Airport functionality.
Sometimes I cannot get any networks to show up at all. I tried a restart but even after that the issues persists. 

I already purged the usual files  also mentioned here


New MBP suddenly can&#39;t find any more Wi-Fi networks 


Since I even booted the computer from a MacOS 10.14 Boot device with the Wi-Fi still not seeing networks, I am suspecting a sort of hardware issue. 
However. Booting into Diagnostic Mode and running the tests does not show any issues. 

Only booting the Mac in Safe Mode once and then booting back into normal mode solves the issue for some time. 

What does Safe boot do with the Airport hardware or any other software to make it work again?
I had the exact same problem. Are you by any chance running BBEdit? I found that the preference files were being stored as BBEdit text files rather than as ‘property list’. Trashed BBEdit and restarted... WiFi is now working