What happened to my AirPort card after running KisMAC?
When you start KisMAC, it automatically loads a driver replacement for the AirPort card, enabling monitor mode. To reload the OEM driver, simply quit KisMAC. Sometimes it also may happen that the AirPort icon gets lost. If this should be the case, please re-enable it in System Preferences. If your AirPort driver is not restarted when you quit KisMAC, it is very likely that you had a network application running when you started KisMAC (e.g. Internet Connect or the Network pane of System Preferences). Please note: Do not unload a driver when KisMAC is running! This is very dangerous and will most likely cause a crash!