Hey Ray and others - this is such a great day!!
Wonderfull news for all ATI 5000 and probably even 4000 and 6000 owners!
http://netkas.org/?p=671
The Framebuffer driver from Lion Build 11A390 works on Snow Leopard and even better! It seems to work on all ports
without Inject!
I have just tried it with my HD5570:
Owners of HD4000 cards known to work using HD4600 / HD4800 Controller kext please try this as well.
Also some HD6000 cards including Mobility might work on Snow Leopard, like those:
0x6741 Radeon HD 6650M
0x6720 Radeon HD 6900M Series
0x6758 Radeon HD 6670 (OEM Only)
0x6738 Radeon HD 6870
0x6739 Radeon HD 6850
0x6718 Radeon HD 6970
Support in 10.6.6 Accelator is present.
Other HD6000 cards might work as well, by adding the Device ID.
No Inject means no need for GraphicsEnabler or ATY_init.kext - be sure to remove those when trying!
Please test and report back guys to push the ATI support list to the max.
Download Content: ATI4600Controller.kext, ATI4800Controller.kext, ATI5000Controller.kext, ATI6000Controller.kext, ATIFramebuffer.kext & ATISupport.kext