Some damn fine RTS games for $5 a pop!* Company of Heroes Gold $5
* Supreme Commander Gold $5
* World in Conflict Gold Edition $5
* Warhammer 40K: Dawn of War-Dark Crusade $5
* Battlestations Pacific $5
* Codename Panzer-Cold War $5
* Hearts of Iron II Collection $5
* Brothers In Arms Road to Hill 30 $5
* Delta Force: Land warrior $5
* Delta Force: Task Force dagger $5
* Supreme Commander Forged Alliance $5
* Company of Heroes $5
http://www.direct2drive.com/d2dturns5
(they also have allot of other $5 games like Assassin's Creed and a ton of others)
I think they have some mac games as well, but this is mostly for PC people.
You download your games, kind of like steam.