I have a Imac with Xbmc installed running wireless and connected to my Atv3. What I would like to do is stream content from the Xbmc to the Atv3 via Airplay. Right now I do get video on my Tv; however no sound. Trying to figure out what I could be doing wrong. It can be noted; that I can stream movies from my external drive connected to my Imac. Sound and video does work in that scenario. Any suggestions?