If you see “AirBeamTV Audio”, you have the audio driver version 2. To uninstall it, you need to delete /Library/Audio/Plug-Ins/HAL/AirBeamTVAudio.driver

Detailed instructions:

1. Open Finder
2. Use the menu “Go” -> “Go to folder…” (or press Shift + Command + G)
3. Copy the following path: /Library/Audio/Plug-Ins/HAL
4. Click “Go”
5. Delete “AirBeamTVAudio.driver”. You will need to enter the administrator password because this is a system location
6. Reboot your computer. After the reboot the driver will disappear in the system sound preferences

If you see “AirBeamTV”, you still have the audio driver version 1. To uninstall it, you need to delete /Library/Extensions/AirBeamTV.kext

Detailed instructions:

1. Open Finder
2. Use the menu “Go” -> “Go to folder…” (or press Shift + Command + G)
3. Copy the following path: /Library/Extensions
4. Click “Go”
5. Delete “AirBeamTV.kext”. You will need to enter the administrator password because this is a system location
6. Reboot your computer. After the reboot the driver will disappear in the system sound preferences