No audio when AirPlay mirroring from MacBook Air to Apple TV
Found a solution on Apple forums, posting it here in case anyone else runs across this problem. I had to:
- Turn off AirPlay Mirroring
- Open Sound.prefPane and select Apple TV as the output
- Turn AirPlay Mirroring back on
For some reason it appears you have to manually set the sound output before connecting AirPlay Mirroring
Source
Before turning on AirPlay Mirroring go to Settings, Sound and choose Apple TV as output device. After this is done turn on AirPlay and choose Apple TV. If there is still no sound make sure the sound level is set high enough. On my MacbookPro, the sound was reset to lowest level after changing the sound output to Apple TV.
When finished with AirPlay, change sound output back to internal device.