Apparently. Friend of mine purchased the game from the Mac App Store. We planned on having a good night playing the Death Sniper mod. After fixing the silly punkbuster problems we were first faced with, and had to resort to copy and pasting each other IP's and using the connect console command due to the server list not showing for him, when COD came to downloading map and mod files, he was presented with an error. Well... I had a good night playing the mod because my Windows Steam version can download maps and mods perfectly. Due to the problems, I contacted Aspyr support for him. This was the reply. The Mac version does not support mods. I simply don't believe Aspyr have decided to drop support for around 75% of the COD4 servers. An utterly stupid decision like this, along with the fact that it took an hour or so it get normal servers working due to punkbuster and the lack of a server list just shows to me even more that it isn't worth buying games for the Mac platform yet. Especially since the game was priced at £30 and I got my fully working (and graphically better due to directx) copy at £15 off Steam. TL;DR version: Don't buy it.