Unable to get Intel HD 4000 graphics and audio working on EFI install of Windows 10 Bootcamp on Macbook Pro mid 2012 I have installed Windows 10 on my Macbook Pro mid-2012 (MacBookPro9,1) using the EFI method. Note: I am intentionally wanting to use Windows 10 in EFI mode instead of the legacy MBR/BIOS method. 

Below are the basic specs of my MacbookPro9,1 model:


15inch display with NO Retina 
i7-3720QM 2.6GHz with Intel HD 4000 integrated graphics
Nvidia GeForce GT 650M dedicated graphics
8GB RAM
EFI and SMC firmware are updated to latest by installing macOS Sierra 


I used this guide to install Windows 10 using EFI method: https://fgimian.github.io/blog/2016/03/12/installing-windows-10-on-a-mac-without-bootcamp/ 

I was able to successfully install Windows 10 using EFI method. After installing Windows 10, I installed the latest v6 of Bootcamp drivers and support software. Everything works except for the below listed below. 

Problem

I am unable to get audio to work. There is no sound from the speakers or headphones. Device manager shows "This device cannot start. (Code 10)" for High Definition Audio Controller. After reading around in other forums, the audio issue could be related to Intel graphics drivers. I am unable properly install the integrated Intel HD 4000 graphics drivers also. 

As shown in the attached image, the Device Manager shows a yellow exclamation mark on "Microsoft Basic Display Adapter" and "High Definition Audio Controller". The attached image shows the device error for each of these. 

To get the audio/sound working, I tried running the following two files. However, this still didn't fix the issue: 


BootCamp\Drivers\Cirrus\CirrusAudioCS4206x64.exe 
BootCamp\Drivers\Cirrus\CirrusAudioCS4208x64.exe 


I tried updating the drivers for the Microsoft Basic Display Adapter to Intel HD 4000 drivers using multiple methods (listed below). In all cases, the drivers are detected but while the drivers are being installed, Windows crashes and automatically reboots. 


Letting Windows search automatically for updated driver software 
Bootcamp drivers located in BootCamp\Drivers\Intel\IntelIvb_Win10\Graphics
Intel HD 4000 graphics drivers on Intel's Download center website 


If I am connected to the internet, Windows 10 by default automatically tries to install the latest display drivers in the background. This leads the computer crashing and rebooting. I have to manually prevent Windows 10 from automatically updating the drivers to stop the crashing from occurring. 

Is there way to at-least get the audio to work?  Is there anyway I can properly get the Intel HD 4000 drivers to install in the EFI install of Windows 10 on Macbook Pro mid 2012? 



See image below also.
I realize this is an old thread, but I had this same issue and I was finally able to get the on board audio working by following this:

https://egpu.io/forums/pc-setup/fix-dsdt-override-to-correct-error-12/

I think they attempted this in order to install an eGPU but it serves the purpose of allowing the on-board audio to work. The only thing that isn't working on my 2012 non-retina MBP is the on board graphics driver (Intel Graphics HD 4000) which is fine because the NVIDIA drivers work fine (only with the most recent driver patch from December 28, 2018, the "current" drivers from December 12 crash the computer) and allow proper "sleep" which wasn't possible previously. 

Only feature that doesn't work is the ability to adjust the brightness. Staring at this very bright screen will drive me crazy, but in trying to fix this one last problem, I have had to re-install Windows twice, so I am about ready to give up. Any ideas?