PLEASE HELP I have installed Mavericks 10.9 on my Dell XPS l501x and everything except graphics is working fine. How can I fix the graphics problem?? 1st gen Intel i5 intel HD4000 graphics nvidia 425m graphics card I couldn't find any option to disable nvidia graphics in bios. Tried intel hd4000 kext given in Niresh downloads. Did try multi beast too.. but no good. Please help me if anyone has got any idea to fix the graphics.. Thanking you in advance.