One of the big new Mountain Lion features is AirPlay Mirroring. This will let you beam your Mac’s desktop, videos and Keynote presentations to any screen connected to the Apple TV. This feature alone will probably sell zillions of Apple TVs into conference rooms the world over. But who wants to wait until OS X 10.8’s summer launch? With a couple of apps, you can use AirPlay on your Mac right now.
Get AirPlay On Your Mac Right Now With AirParrot, AirServer