Lets start with this. I have an early macbook pro 2011 and the newest Apple TV. I am able to mirror my macbook through my apple tv, but here is the issue. My apple tv hibernate when not in use it (this is normal of course). But when I wake it up from sleep mode, then suddenly Im not able to airplay anymore. The airplay icon is gone on my macbook pro. The icon only returns if i do the following. I have to restart my apple tv and then, on my macbook pro I have to log off my wifi network, wait a few seconds, log back on, and then the airplay icon pops up ready to use. This I have to do every time. Its frustrating. Anybody heard of this? This is so unapplelike! But maybe its just me having this issue. Except for this Im a happy camper. But the airplay feature was the main reason I upgraded to ML.