I have everything working on my xps 15 9530 with el capitan 10.11.3 thanks to your amazing guide except for graphics. I have no idea how to go about fixing it. I was wondering if you could give me a little guidance. The problem is when I try to patch IOKIT with the git hub it gives me an unknown version error and won't patch. I'm wondering if this is because of 10.11.3 being different? I found the information in the thread that said how to manually patch it so I did that. It works with acceleration on external and internal monitor except when I unplug the external monitor. When I do that the internal monitor goes black and flickers every once in a while if move the mouse around but will not stay on. I have the dvm pre alloc graphics set to 128mb and followed the guide to a T. Do you know what I need to change. I'm wondering if the frame buffer for IOKIT didn't get patched when I manually patched it? I tried booting without caches and rebuilding caches multiple times with no effect.