Software > Utility Software > AirPortAtheros40 Installer v2.0
AirPortAtheros40 Installer is an OS X app that provides support for internal wireless cards by installing the missing AirPortAtheros40.kext into /System/Library/Extensions folder and repairing the permissions.
Download: 1.0 | 2.0
Mirror: insanelymac.com v2.0
Substitute: HorNDIS + Android Phone/Tablet | USB Wi-Fi Adapters
Compatibility: OS X 10.11 and later.