My sister-in-Law just got a new iMac after previously owning a PowerPC iMac..I know about time right?? Anyway. I set up the new iMac and transferred all her iTunes data to the new mac but I can't get the AppleTV 2gen to recognize that home sharing is indeed turned on. Both are on the same network, it worked fine on the previous mac. I even restored the AppleTV and set it up as new and still it tells me to turn on Home sharing on the mac. Any ideas?