Radeon HD 7850M

[T1hom7as]

Thank you. I installed the kext and they load just like yours, but my 7850m isn't still working unfortunately.
The HD4000 should be fine also, but I dont get that one working too. I read somewhere it's because I have the 3290NR 3D. Thanks to the 3D it loads the 7850M by default. Do you know anything about this?

Have you checked in the BIOS to see if there is an option to switch GPU's by default?
Also for HD4000 try using GraphicsEnabler=Yes.

 

[T1hom7as]

The problem with the envy 17 3000 series is they have a locked bios. It's like there are no option to configure. GraphicsEnabler=yes tested, bit didn't work. I read about 7850M being a rebranded 6-serie. It might be possible to put the PID and VID in a AMD 6000 kext. The kext might load up and be used by the 7850M. Could somebody try that? I don't know how to do that.

I believe the same system is being used here with your GPU:
http://www.tonymacx86.com/mountain-...86-official-thread-mountain-lion-hp-envy.html