I'm having a bunch of problems with my ATV3, and was hoping some of you could tell me what is going on based on my hardware and internet. Here goes: My problems are that - When I mirror to my ATV3 from my iMac the picture on my ATV/Sony TV freezes and stumbles. Did so with HBO GO last night. - When I watch trailers on my ATV3 they are sometimes SUPER slow to load. This also happened with a show I purchased in Standard Def from the iTunes store (Top of the Lake). - When I mirror from my iMac to ATV3 the audio sometimes continues to come from my iMac and not my TV. I have to restart the computer to rectify the problem. - MLB TV on ATV3 goes in and out of awesome HD and something much uglier than SD (although it primarily stays in HD). 4-5 years ago I did not have this problem with my Roku/MLB. My hardware - ATV3 (with latest iOS installed) - Early 2011 iMac 2.7 GHz Intel Core i5 running OSX 10.8.3 - Netgear wireless-N 300 router WNR2000 v2 - RCA DCM425C cable modem (rental from Comcast) Finally - The ATV3 is hardwired with an ethernet cable to the router - Speedtest.net just gave me 23.1 mbps down and 4.58 up - ping 9ms (what I usually get) - Comcast/Xfinity high speed internet Hope someone can help. Thank you!!!!!