Currently Being ModeratedNov 8, 2012 3:25 PM (in response to MrBrew)
A similar thing happend to me about a month ago. Turn off home-sharing in itunes, shut down itunes and re-boot your mac. Open itunes and turn home sharing back on. Re-boot your Apple TV and your mirroring should work. Good luck!
Currently Being ModeratedNov 9, 2012 3:11 AM (in response to quinster2)
That didn't solve the problem. Home-Sharing works. It's the AirPlay Mirroring that drives me crazy.
Thanks for the Tip anyway! Didn't know that it's possible to restart the ATV.
Currently Being ModeratedNov 13, 2012 3:25 AM (in response to MrBrew)
I figured it out! It was a firewall issue.
I use Handsoff and I checked it before i wrote here. There was no "user defined rule" that denied the communication but when i changed to "All rules" the program displayed several rules regarding AppleTV and its IP.
So if anybody has the same problem make sure you see all rules of your firewall and get rid of the AppleTV related rules generated by the program itself. You dont need to update to the latest iOS on the AppleTV!
I hope that I can help some people with this info to fix the problem.