i just visited the steam site for the preorder, where the didn't show any information on a mac version.

will there even be one? any info when it will be released?

We have not even started on a MAC version as yet. We have never done a MAC game and thought it prudent to finish the PC version first.

http://forums.steampowered.com/forums/showpost.php?p=16359822&postcount=12