I got this system
recently, and have been disappointed with not being able to use 5.1 surround sound from my MacBook Pro. It's a unibody MBP, the newest model (or very close); bought a bit over a year ago.
I did some Google searches, and it seems my only option is to get an external sound card (USB). However, there were also some things that indicated the MBP supports surround sound, but I need some kind of adapter to use it.
I'm hoping someone can give me a definitive answer on my options.