A few days ago PC6 small part of a colleague's own MacBook Battery forgot to charge, the computer suddenly shut down, and then power on the WiFi can not open, tried the online those unreliable method after invalid. To find a small part of my help to solve, small series finally in a foreign forum to find a way to successfully solve the Apple laptop WiFi can not open the fault, the following to share this method for everyone to do a reference:
1. Open finder, press Command+shift+g to this path:/library/preferences/systemconfiguration/
2. Move the following files to the desktop save (just in case)
Com.apple.airport.preferences.plist
Com.apple.network.identification.plist
Com.apple.wifi.message-tracer.plist
Networkinterfaces.plist
Preferences.plist
Delete these files in the original directory, you need to type the administrator password
3. WiFi Recovery after reboot
The principle of this solution is to let the system to force the recovery of WiFi settings, hoping to solve your problem.