I had an Apple TV 3 in Nov 2012 and it came loaded with ATV OS 5.0.1. The Apple TV Airplay worked flawlessly on all my iDevices, my G4 powerbook and my G4 Mac Mini. I didn't update the Apple TV at all because it was working perfectly. Then this ATV 5.2 update was released. Apple servers pushed this update constantly to my Apple TV causing my Satellite Internet provider to throttle my connection due to overages on low bandwidth caps. If Apple TV was unplugged nothing was ever downloaded but 2 mins after powering up the Apple TV, the download graph showed the update attempting to start over on another update. To prevent further ISP issues, I installed the update with no problems. Unfortunately, now none of my G4 PPC computers can use Airplay to the Apple TV. The icon shows in iTunes but it tries to connect to the ATV via Airplay and simply stops after 2 mins. I found out the hard way that this ATV 5.2 update is based on iOS6.1 and apparently is NOT compatible with PPC computers for Airplay use. My ipads and ipad touch devices can still use Airplay successfully. The ipads are still using iOS5.1.1 because iOS6 is incompatible with G4 PPC macs (to sync). So any of you who have pre-Intel Macs and use Airplay with an AppleTV, do not update your ATV to 5.2 or you will lose that functionality.