Sorry if I offended you. If you have a Z97 system as your profile states, you may be better off with the board ID from iMac15,1 for better CPU power management. X79 works with MacPro5,1 too but it draws a lot more power at idle.Thanx. I'll be sure to follow up whenever I upgrade my hardware.
No.. absolutely not. What I should have done was keep up with the forum when the Z97 was hot. The changes I made was from when the 6,1 was not recommended and I was persistent to use it (back to Mavericks). When I figured it out, my system worked flawlessly and system updates and upgrades worked perfect (and all the bells and whistles). May be some of the guys with older boards can benefit from my finding.
Does it work for later iMac system definitions?
I'll add it to the original post.
My preferred method. For those of you using MacPro6,1 and willing to get a little more geeky, assigning the name GFX1 to your GPU in your ACPI tables (DSDT or SSDT) will also work without the need to patch any kexts and you won't need to worry about re-patching anything after OS X updates unless Apple changes the device policy again (credit : dgsga and furter).
In this pic from IORegistryExplorer you can see the AppleGraphicsDevicePolicyControlClient loaded on my second GPU (GTX 980) installed in PCI slot 4 (NPE7):
In this state, it will not send a video signal from any of it's ports.
In the next pic you can see that I have injected my GTX 980 as GFX1 in NPE7 and AGDPCC is no longer loaded to it:
Now all ports are functional. It's also worth noting that I have my 1st GPU (GTX Titan X) injected as GFX1 as well.
If you currently have GPU injection via DSDT or SSDT, it's as easy as changing the name. Open your DSDT or SSDT in your editor of choice (I prefer MaciASL) and change GFX0, PXSx, PEGx, or whatever it's name currently is to GFX1. Click compile and save it. If you don't currently have have your GPU injected in your DSDT or a SSDT, see this Guide to create one or more SSDTs for your GPU/s. If your ACPI tables assign specific names to PCI devices when they are installed, It is also possible to rename your DSDT's/SSDT's current GPU device name using clover's ACPI patching function. However, some ACPI table sets don't have a dedicated names for installed PCI devices and when the GPU loads, it gets the name "display@0" under IOPP. See RehabMan's excellent guide here.
You should also read this post if you feel you might be having other Nvidia Web Driver related issues: Solving NVIDIA Driver Install & Loading Problems However, AGDPfix.app or naming the GPU to GFX1 will solve problem 4.
I haven't done any testing with iMac board ids but I don't think it will work, especially with the gpu named gfx0. AGDP specifies gfx0 to be effected by it's code. However, I'm not sure. I'd try reverting to the oem kext and if it won't boot, just use nv_disable=1 to boot and reapply your fix. Or, You should also try the new solution (the 2 kexts) in the OP. That should eliminate your reliance on AGDPfix if it works for iMac17,1. I'm not sure if it does.
