[FIX] Maximum pixelclock unlock (former IOKit) on Sierra DP1

[darkvoid]

On macOS Sierra DP1, a part of the IOKit functionality dealing with graphics has moved to a new framework kext: CoreDisplay.kext.

 

This affects the existing IOKit maximum pixel clock patch used for previous OS X versions. 

 

The new patch to be applied for macOS Sierra DP1 is:

sudo perl -i.bak -pe 's|\xB8\x01\x00\x00\x00\xF6\xC1\x01\x0F\x85|\x33\xC0\x90\x90\x90\x90\x90\x90\x90\xE9|sg' /System/Library/Frameworks/CoreDisplay.framework/Versions/Current/CoreDisplay
sudo codesign -f -s - /System/Library/Frameworks/CoreDisplay.framework/Versions/Current/CoreDisplay

[Xeon3D]

I was wondering if you could explain in more layman's terms, what does this affect, and who needs to run it (Nvidia users? AMD? Intel? All?)

 

Thanks.

[luxus]

@xeon3d

https://github.com/Floris497/mac-pixel-clock-patch-V2

 

 

 

What does this patch resolve?

• makes 4K/3840x2160/UHD/2560x1080/3440x1440 resolutions possible on older macs over both HDMI and DisplayPort. (other odd/high resolutions should also work)
• Enables HDMI2.0 on Nvidia Maxwell cards (Never tested this myself, for this you only need the IOKit patch not the Nvidia patch)

[transocal]

Has anyone got this to work on the official release of Sierra?

I used Floris Pixel Clock CoreDisplay-patcher with the club3d CAC-1070 DP to HDMI adapter on GTX 760 and was working in El Capitan, but can only get 3840x2160x30Hz, but not 60Hz.

 

Thanks.

[UNOE]

Thanks for updated patch haven't tested it yet but wanted to make sure this was available before updating.