Setup: Macbook Pro with Logitech Z-5500 5.1 surround sound speakers on Leopard. Connected with a digital optical TOSLINK cable (plus mini-TOSLINK adapter.) What I want to do: Play games with 5.1 channel surround sound. Games in question: Unreal Tournament, Unreal Tournament 2004 (both support 5.1 surround.) Problem: I can't do that. Using the Logitech control unit, I can specify 4 settings: -Stereo (subwoofer + 2 front speakers) -Stereo x2 (sub + 2 fronts + same sound through 2 back speakers) -Dolby PL2 Music (sub + centre only) -Dolby PL2 Movie (sub + centre only) This is the problem: I cannot find a way to output proper surround sound. It's enabled in the games, I just can't find a way to get it to work with my speakers. Anybody got experience here?