Gey all, So I finally updated. I'm on a 2011 MBA. I guess I didn't fully understand Airplay...I thought that, like iOS, when playing a youtube vid, I could stream it to my ATV. But it seems that you have to mirrir your entire screen and then go full screen...is this correct? ALso, when doing that, when I stop the resolution doesnt seem to come back correctly to the mac screen...is this just me?