Hello! Sorry if this topic was discussed like 100 times in the past, but I'm in need of quick reply. Plus english isn't my native language so please forgive me if there will be any grammar errors Short story - I bought the newest 21'5 iMac that comes with GeForce 750M. I come from PC, so I'm fairly new to Mac computers, but I own iPhone. I didn't bought Mac for gaming, so don't worry. But I have some problems with it. My Steam library is huge, so I have good amount of games to test. On my PC I mainly played Dota 2 which seems to be nearly unplayable on Mac (around 40 FPS on max settings, this is way too low for being good). The funny thing is that I also installed Batman Arkham City from Steam, and it runs perfectly fine @ 1080p with maxed settings. Even better than on my PC with GeForce 660Ti. Why is that? Is it just Batman being greatly optimized for Mac and Dota 2 not or I'm doing something wrong?