Hello I have installed Niresh Mavericks 10.9 on my laptop, But problem with graphics card as mentioned below. 1. If I have selected backup graphic kext during install I can boot in to mavericks but graphics memory shows 4mb only...After I tried all ati kext but failed to load....... 2. If I selected graphics enabler=yes then i'm getting black screen. Please help me with this issue, I attached the photos FYI... .