I managed to get WinBUGS to run in Mac OS X as well by using Crossover: http://www.codeweavers.com/products It's a fancied up version of WINE that works nicely with OS X. I think someone else in the class tried WINE but it didn't work, so they (Crossover) must have added a few things since then that make it work. I'd be happy to walk anyone in the class through doing this if they really want to use WinBUGS in OS X.