Currently Being ModeratedApr 15, 2013 9:37 AM (in response to kandifromid)
Your mac and OS support mirror, are you getting the icon near the clock for that? If not reboot ATV and router, that often helps. Mirror allows you to play your screen.
Currently Being ModeratedApr 15, 2013 9:57 AM (in response to kandifromid)
the org 1g alu appletv does not support airplay at all
but the later black ones should
Currently Being ModeratedApr 15, 2013 7:35 PM (in response to kandifromid)
Do you have Mirroring turned to the on position on your iMac. To turn it on click System Preferences > Display > Display Tab > at the bottom of the screen check "Show Mirroring Options in the menu bar when available. Above that you will see Airplay on/off. Turn it on. If you do not see it your iMac does not support Airplay. But it should be there on a 2011 iMac running Mountain Lion.