http://www.apple.com/osx/specs/ http://www.apple.com/osx/specs/ lists the following macs as supporing AirPlay * iMac (Mid 2011 or newer) * Mac mini (Mid 20

http://www.apple.com/osx/specs/ http://www.apple.com/osx/specs/ lists the following macs as supporing AirPlay * iMac (Mid 2011 or newer) * Mac mini (Mid 2011 or newer) * MacBook Air (Mid 2011 or newer) * MacBook Pro (Early 2011 or newer) I remember reading that AirPlay mirroring uses the video encoding capabilities of SandyBridge CPUs, but I can't find a source for that now. Anecdotally, http://airparrot.com http://airparrot.com really taxes my 2010 MacBook's CPU.