Hi, Today we purchased an Apple TV 3 to stream videos and photos etc from our family iMac. Now, the ATV can see the iMac fine, it can play all the videos in iTunes and can see all the photos. However, I cannot for the life of me get it to see my MacBook Pro, and AirPlay just seems to be non-existant. All devices are using the same Apple ID for Home Sharing, all are on the same WiFi network, AirPlay is on in the Apple TV Settings, all devices are using the latest OS/iTunes... I'm truly stuck. I know Home Sharing can sometimes be a bit flakey, but AirPlay, from my experience, usually works. Can anyone help?