AirPortAtheros40 Installer

Software > Utility Software > AirPortAtheros40 Installer
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.

Mirror: https://www.insanelymac.com/forum/files/file/956-atheros-installer-for-macos-mojave-and-catalina/ v2.0