can get my apple tv to use my mac air screen
I can get my Mac Air to work with my apple tv.
MacBook Air, iOS 6.0.2, using with Apple Tv
Welcome to the Apple Support Communities
See > http://support.apple.com/kb/HT5404 If you have OS X Mountain Lion and a Mid 2011 or later MacBook Air, you can use AirPlay Mirroring to stream the computer onto the Apple TV. Follow the steps of the website I have given you.
If your Mac isn't compatible, install AirParrot to stream the Mac onto your Apple TV > http://www.airparrot.com