There's a lot of Windows players with insufficient hardware according to Windows requirements but not OSX requirements.
If there isn't an insane optimization for OSX (and there's no reason to assume this is the case) then we're either telling Windows players that adequate hardware isn't actually, or Mac players that insufficient hardware will do fine.
If there isn't an insane optimization for OSX (and there's no reason to assume this is the case) then we're either telling Windows players that adequate hardware isn't actually, or Mac players that insufficient hardware will do fine.