Steam: Mac to PC

I've never seen a game that is platform locked myself. It's like when a game comes out for PC and 5 years later they release a Mac port, you can then play it in Mac.

What game are you talking about because i can't think of games that are avaiable on mac but not on pc...
What is the reason you want to buy it retail anyway?

When i bought GTA 3 (the old one :) on the Steam Web-shop, i got both a PC and a Mac version. I would recommend buying it from there!

The only games that i know of that have separate mac and pc versions are the call of duty games. As far as i know all other games on steam that have a mac and pc version are together.

if the game is steamplay and that mac store offers you clearly a steam key, you can go for it. on the contrary it could be a digital download (or whatever else) and you'd be out of luck.

Thank you for all the help everyone, it seems to be working, I guess some shops don't have a clue what "steam" is. :)