My roommate just picked up the heroes 5 epic collection for the pc and I was like "sweet, I'll totally pick up a copy and we'll rock out together." ...but there's no mac version of the expansions at all! Will there be one?

I've tried my best to get Freeverse to make the expansions, but they claim that Ubisoft is making it too difficult for them… so, the answer to your question = Nope!