Currently Being ModeratedSep 8, 2012 5:06 PM (in response to Mike in Cicero)
Check the option to display on menubar in System Preferences > Displays.
Edit: Also your profile indicates you're running Lion. Airplay mirroring is only available on Mountain Lion.
Currently Being ModeratedJan 24, 2013 5:38 PM (in response to captfred)
Thanks. I just spent 3 hours trying to fix this problem. Your repsonse was the answer! System preferences and Display, and check box for airplay mirroring, and another check for display.