Hello, I know there are a lot of threads covering Airplay Mirroring. Most seem to latch on to key on to your router and wireless network. My issue doesn't seem to be that 'simple' of an answer: Set-up: Mid-2011 iMac on Mountain Lion 10.8.3 iPad 1st Gen Apple TV 3rd Gen All three of the above run on home wireless network. They are all in the same room. Anytime I run airplay from the iPad to the Apple TV, it runs perfectly! I watched the Masters last weekend, and stream hockey from NBC app. No issues. However, it I try to run airplay from the iMac, the stream is jumpy. I'm trying to watch CBS shows from within safari since they show up a week earlier than in the App...plus you can't airplay CBS shows from the iPad anyway. Seems funny to me that a first gen iPad outperforms a newer iMac. And if this was a 'network' issue, why would the iPad stream any better than the iMac? Help?!!?