I spent a couple of hours yesterday trying to get my late 2011 MacBook Pro to play my iTunes music via Airport Express connected to my Speaker system.In common with so many others I was experiencing intermittent sound when using Airport Express. Anyway I spent some time changing the channels used and also the network speed, 2.4ghz and 5ghz. Nothing I did made any difference, in fact the music became even more intermittent, hardly playing at all. What I did notice is that my Mac got very hot, the first time this has happened, it usually runs very cool. I stopped what I was doing, and tried my music again later that evening, and Bingo it has been working perfectly ever since, even though the channel settings etc are the same as they have always been. Has anyone any idea why my Mac became so hot, or why it should suddenly play iTunes through Airport Express without continually breaking down.