If he games on OS X he buys whatever game he wants to play.
If he plays via Bootcamp, he's got to buy a copy of Windows (about $80 more). That's $80 he could be spending on games!
Clever accounting out of the way.
Why would you loose about 20% performance on the same hardware , on every game ?
For gamers to get 20% boost for all their games, spending $80 (u can get it much cheaper ) is a very simple choice.
Or you can save your $80 and join the other Mac users who ***** about the performance of them Mac version of the identical game as the driver developer does not care, nor does the game developer, as more than 90% of thier effort goes on the PC version.
Do you realise how bad video drivers are on the Mac side vrs the PC side for the same hardware when it comes to gaming ? PC drivers are tuned for performance , with profiles for specific games , Mac side, you get a very stable driver, sacrificing performance so to be stable.
Also, why would you spend $80 on Windows to get access to hundred more games?? When the Mac side run so many of the latest games out there.....owwww wait...., not even blizzard who support Mac, are releasing Overwatch on Mac now....
One thing Windows does well, is gaming.