I currently have a iMac from 2011 with AMD Radeon HD 6770M 512 MB graphics. I have bought and tried running Battlefield 4, but every time i play the game an error pops up saying that I need to update to the latest drivers in order to maximize my performance. I have tried multiple times to download the latest drivers from your download page, and have even downloaded the mobility catalyst and raptr gaming evolved optimizer. But to no avail, I still get the error when I am opening the game. When i play the game it lags and stutters rendering it extremely hard to play, and I don't think it is the game itself or my internet connection. If anyone would help me out; it would be greatly appreciated.