Sadly it is true, MAC GPU's are often the same hardware used in laptops. Also, Apple sprinkle a special kind of awfulness onto their drivers. I tested this wit

Sadly it is true, MAC GPU's are often the same hardware used in laptops. Also, Apple sprinkle a special kind of awfulness onto their drivers. I tested this with Quake III (a game from 1999!). My 2011 iMac could not render the game at 120fps, it managed somewhere between 50 and 70. I bootcamp into Windows, and I get a rock solid 120fps.