Can I use airplay mirroring with iMac Late 2009?
Can I use airplay mirroring with iMac Late 2009 if i upgrade to Mountain Lion and use an Apple TV?
iMac, Mac OS X (10.7.5)
No, as it requires a Mac from 2011 or later. However, you can use a 3rd party option like Airparrot (use the trial to see if it works for your needs)