ati6000controller.kext

I've searched around for a couple of hours now and tried and failed. First of all my setup looks like this: Asus P8Z68-V-Pro Gen3 Intel i5 sandy bridge XFX Double D HD-687A-ZDFC Radeon HD 6870 1GB Previously I was running 10.8 as I failed to upgrade, so i stayed in that version for a...