New MBP suddenly can't find any more Wi-Fi networks
Did you try to delete those network plist file?
Doing this you "Reset" the Wi-Fi:
- Close your Wi-Fi from Macbook
- From toolbar select -> Go -> Go To Folder
- Paste this address
/Library/Preferences/SystemConfiguration/ -
Locate and delete these files
com.apple.airport.preferences.plistcom.apple.network.identification.plistcom.apple.wifi.message-tracer.plistNetworkInterfaces.plistpreferences.plist
Now restart your Macbook
- Open your Wi-Fi and test again