New Mac Pro, AirPlay Mirroring Icon not appearing
I have a brand new Mac Pro (purchased within the past month). Just installed Mountain Lion.
Mirroring is enabled in the Display preferences.
AppleTV is updated to the latest version.
I can use AirPlay from iTunes (it sees my AppleTV and I can send sound and video), but I do not have the AirPlay mirroring icon in the main status bar and don't seem to be able to mirror from anything.
Mac Pro, Powerbook G4, Mac OS X (10.4.7)