AirParrot for Mac uses AirPlay to mirror your Mac's screen to Apple TV, wirelessly. This is great for Macs that are older than mid-2011 as OS X 10.8's AirPlay mirroring does not work on them.

• Use AirParrot Remote to begin streaming media files from your media server, or use it to start a presentation when your computer is in another room. AirParrot Remote means no wires and no physical access to the computer is required!
• AirParrot Remote controls AirParrot 2 on your computer. It will not allow you to send your iOS device or files found on your iOS device to a destination.