Airplay mirroring
I have a new iMac. Bought it in July, 2012. It runs Mountain Lion.
I have an Apple TV. Model MC572LL/A. Software 5.1.1 (5433)
Airplay worked for the first few months. Then it disappeared.
There is no icon. The display setting states "No Device Detected."
I have rebooted and reset everything, including the router. I have tried the Apple TV both wired and wireless.
We are on the same network; in fact, I can access my photos (even brand new ones) through home sharing.
I cannot, however, airplay or mirror anything.
It doesn't work with my iPad 2 either.
Please help.
Apple TV (2nd generation)