I have a Late 2011 MacBook Pro and an up-to-date AppleTV with Airplay enabled but cannot get AirPlay mirroring to work. Nor do I see an AirPlay Mirroring icon on my MacBook Pro's menu bar or in System Preferences > Displays.
In researching this issue, I read articles (such as this one http://support.apple.com/kb/HT5404) stating that MacBook Pros versions Early 2011 or newer should have the capability.
Any suggestions why AirPlay mirroring does not work for me?
MacBook Pro (15-inch Late 2011), Mac OS X (10.7.5)