I'm really excited to see WCS playable for Mac users. I used to play Wing Commander as a kid, I think it was part of a bundle with Strike Commander (both great, story driven games in their own rights.)
Anyway, I downloaded the Prologue a year back and noticed stability issues on the Mac version. The game would freeze up during the start up menu and after the first mission. Come to think of it, my old Wing Commander game used to freeze up on my ol' Compaq whenever I would crash. Good memories, nevertheless.