Perfect

It is the best rally/race game. It works like a charm on iMac 27 Retina with OS X Yosemite.
I set the resolution to 2560x1440 and the game is smooth and very playable. Works with Logitech G25 (and probably G27) but you need to configure the wheel using setting menu.

iMac 27 Retina (4.0 GHz, AMD Radeon R9 M295X 4096 MB, 32GB RAM)
2560x1440. All settings: high/max
Avarage frame rate: 61. Minimum frame rate: 51

Zdecydowanie polecam. Piotr

PiotrFromPoznan about DiRT 3 Complete Edition, v1.0