Can't get R7 260X 2gb to work on High Sierra

[jwfieldgibson]

I've been trying to get my r7 260x to work with High Sierra and can't seem to get it to - the computer works fine, however it only shows up as 7mb VRAM. I've tried injecting ATI (not sure I've done it right though), and have added the device ID (0x066581002) to AMD8000Controller.kext and AMDRadeonX4000.kext, but still there's screen tearing and only 7mb VRAM showing. Any ideas?

(System report attached)

 

[sunnyboy958]

I've been trying to get my r7 260x to work with High Sierra and can't seem to get it to - the computer works fine, however it only shows up as 7mb VRAM. I've tried injecting ATI (not sure I've done it right though), and have added the device ID (0x066581002) to AMD8000Controller.kext and AMDRadeonX4000.kext, but still there's screen tearing and only 7mb VRAM showing. Any ideas?

(System report attached)

I had hacked a PC macos 10.11.6 with hardware as

i3 4160
8g
b85m hds
r7 260x

I followed https://www.tonymacx86.com/threads/success-ga-z77-d3h-amd-radeon-r7-260x.183213/
I didnot injecting ATI and fakeid, just added id to AMD8000Controller.kext and AMDRadeonX4000.kext, and installed them by Kext Utility, restarted and booted with argue "-f -v".