Edit: For anyone who has steam. you can get and play Portal free for PC or Mac from now till the 24th of may.
elchebib wrotepracto wroteI heard that a LOT of games available on Steam for Windows will not be available for the Mac version.
True. All of the big games haven't ported to the mac yet but giving the game developers an option to distribute games easily through the Steam client will make Macs a very viable option.
If steam gets integrated into its fullest with most of the games. And games do get released on both windows and mac at the same time. Then I predict a strong competition between mac gaming and windows gaming in the next few years.
That if there will be better driver support for mac. My friend has just been trying portal on his mac and he told me the framerate was horrible even though he has a 9600M. All because of bad drivers for the mac probably.