With Mountain Lion coming out this week I've been all excited about finally buying an Apple TV to use airplay mirroring. Well after looking through some forums on the web it appears that's no longer an option. I purchased my iMac last year sometime (can't remember exact date) and it still seems very new to me. But apparently it's too old to support mirroring. According to Apple's website, mirroring is only supported on iMac's from mid 2011 or newer. Well after doing some digging, mine is mid 2010. It really ticks me off especially since I didn't buy it until sometime in 2011. So I guess I'm out of luck. Does anyone else have a mac that's mid 2010 that been able to get the mirroring to work? I don't understand what's so different about the two models that mine wouldn't work. I guess since that was the main reason I wanted the apple tv I'll be holding off for now.