My scenario is that I have a MacBook Pro setup with some nice speakers. However, often when I listen to music I'm not seated in front of the Mac, nor do I want it in my lap. Instead, I'd like to select the music I want to hear using iTunes running on the iPhone, but have that music playback on the Mac & it's connected speakers. So, a little like Sonos, I suppose. Is there a way to do that using iTunes, or perhaps another app? Thanks!