I haven't had any crashes, but basically the same as DraicDreamer. I didn't have any freezing/hangups at first, through midway chapter 3, despite running on High/Medium with a standard early-2013 Mac Pro. But now I can't get past [spoiler] the campaign cutscene. It keeps hanging during the initial campaign convo with the campaign manager. [/spoiler]
I saw someone mention something about changing the resolution, but I can't seem to change it to anything other than 1280 x 720. If anyone can help with that, I'd appreciate it!
Mac OS X Mountain Lion
2.9GHz Intel Core i7
8 GB RAM
Intel HD Graphics 4000