This is updated kexts for OS X10.9 Mavericks , install it like another text and boot using GraphicsEnabler=Yes .
1 . Figure out your graphics device ID
- about this mac
- more info
- system report
- click on graphics/displays from left sidebar
2: delete all ATI and AMD related Kexts and injectors EXCEPT these
3 :Add your Device ID to ATi5000controller.kext and ATiReadeonx3000.kext.
- GO to System/Library/Extensions
- then find one of the above Kexts and show package contents
- add you dev id to info.plist under IOPCIMatch
updated fixed kexts