Working great on my little Mac Mini (Snow Leopard v. 10.6.8). Now I know what I'm grateful for this Thanksgiving: Thanks for bringing MoI over to the Mac, Michael. I might have an upcoming job that will require the on-site usage of a Macbook and I can just about guarantee I won't be allowed to use Windows via Bootcamp if I do (nor do I want to spring for the additional cost of the OS). You couldn't have picked a better time to release this.