Hi livluvrok,
I am about to not answer your question but hopefully someone else can answer it.
Not sure about Fritz (looking at their chessbase website, never mentions mac's) but Shredder certainly does according to their website shredderchess.
and there is this article :
http://www.chess.com/forum/view/chess-equipment/chess-software-for-mac
I really wanna get Fritz13 but I have a mac. Is it possible to get it on a mac? If so, could you please leave a comment giving me a link? Thanks :)