Network service inactive/Unable to add Wi-Fi network on mac pro I have no idea what happened but my Wi-fi network has disappeared completely! The Wi-fi icon found on the top menu bar is gone. I'm unable to create a new Wi-fi network service but only able to connect to the internet via LAN cable. I've checked my system information and it says that my network service is inactive. Not sure if reformatting my laptop would make a difference. HELPPPP!
The + sign on the bottom left of the dialog is the button you want to press.

Or switch your location back to automatic if it isn't already.