I'm having the same problem with mac osx lion and steam... I can't believe how you pay for the original game, it doesn't work and you don't have a fix... not even an answer from ubisoft. This is just disrespectful with us, customers. I just want to play an original game, I don't think this is too much to ask. But I've been searching for a while now and it looks like this situation have been happening for a few months now, maybe it'll be easier to play if you just download a cracked version without ubisoft launcher.