So I had a Radeon HD 5770 before, and on 10.10.3 it performed nearly twice as fast using Steam's In-Game FPS counter vs. my newly arrived GTX 680 Mac Edition under 10.10.4. Seemingly the only game that's benefiting from the GTX 680 properly is Robo Disco Dodgeball, which runs on the Unity Engine. However, games such as Borderlands Pre Sequel and all the Call of Duties are running really slow vs. the ancient 5770. BioShock Infinite also seems to be running better in some ways, but worse than the 5770 in others. Super frustrating... Is this a driver thing? I tripled check to make sure the GPU was seated correctly in the proper slot. I'll let you know how the 10.10.4 Web Drivers affect this. Anyone else have any insight about this? Also anyone know the ETA of Nvidia's Web Drivers?