I have a late 2011 15" Macbook Pro with OSX 10.7.5. I wanted to do mirroring through my Apple TV (2nd gen, I think). According to what I've read, I should be able to do this, but the airplay icon doesn't appear on my tool bar. Then I wanted to check if my network recognizes the apple tv, but I can't find that place where it shows everything on my network. I went to preferences/network. It says I'm wifi connected, but I thought there was a tab or something that tells me that's connected. I've got an airplay extreme, Western Digital external drive that backs up through Time Machine, the apple tv, an iPhone and an iPad (not sure if the last two will show up). Shouldn't I be able to see somewhere on the Macbook that all these things are connected?