I really doubt COD World At War will be coming to the mac. However, since World At War is very similar to COD4, Aspyr might be able to port it over easily since they already have most of the libraries written. If they decide to they should be able to do it in under 6 months I would imagine, but who knows if they will. If COD World At War sells as wells as COD4 did, then you can probably count on them porting it.
"COD5 is coming out next year and is being made by Infinity ward, and world at war sucks anyways."
I could be wrong, but I am pretty sure World At War was badged as COD5.
I didn't get a chance to play it, I got it installed, but by the time I had a chance to try it out the beta had ended. My roommate played it though, and he seemed to like it, even though he has played through COD4. I also thought it looked pretty fun.
For those ripping on Diablo 1+2+3, I will agree that games that have the same content over and over again through the gameplay gets boring. But what makes a game like that is the story. I myself never have been able to get into the story, and so have never played through games like that. Everyone I have talked to that has beaten the game says the story is really good. World Of Warcraft, in my opinion is very repetitive gameplay, but many people have been able to latch onto the story and now it is one of if not the best selling game ever.