big sur 11.0.1

[sail9708]

I have used this patcher on my mac catalina 10.15.6. And after i updated to 10.15.7. Everything was ok!
but i updated to 11.0.1 big sur yesterday. it doesn't work now！what should i do？
and there is no Coredisplay under the directory ‘/System/Library/Frameworks/CoreDisplay.framework/Versions/A/’

[MDandK]

Hi,
Have you found a solution ?
If not, could someone help please ?
Thanks

[sail9708]

Hi,
Have you found a solution ?
If not, could someone help please ?
Thanks

i haven't found any solution to this. and i can't new or modify a file under directory '/System/...' in big sur

[MDandK]

I thinks the only solution to that is to use the the 4k@60hz capable Mini-Displayport to Displayport cable ... but need a compatible monitor !

[wallisch]

Big Sur will be more complicated, since it now has additional security mechanisms which prevent altering the system files. See https://eclecticlight.co/2020/06/25/big-surs-signed-system-volume-added-security-protection/.

Also, as you noticed, CoreDisplay apparently moved and i couldn't locate it yet.

The steps will probably be:

• Boot to Recovery
• Disable SIP
• Disable Authenticated Root (Requires FileVault disabled)
• Locate new CoreDisplay
• Reverse engineer new CoreDisplay & patch the pixel clock
• Bless new snapshot of now modified volume
• Boot to macOS

[sail9708]

Big Sur will be more complicated, since it now has additional security mechanisms which prevent altering the system files. See https://eclecticlight.co/2020/06/25/big-surs-signed-system-volume-added-security-protection/.

Also, as you noticed, CoreDisplay apparently moved and i couldn't locate it yet.

The steps will probably be:

• Boot to Recovery
• Disable SIP
• Disable Authenticated Root (Requires FileVault disabled)
• Locate new CoreDisplay
• Reverse engineer new CoreDisplay & patch the pixel clock
• Bless new snapshot of now modified volume
• Boot to macOS

Thanks for your replying!
Referring to the latest method of enabling hidpi, maybe we can operate everything under directory ‘/Library/...' instead of '/System/Library/...' ？
is that be possible?

[Rothschildiuk]

Big Sur will be more complicated, since it now has additional security mechanisms which prevent altering the system files. See https://eclecticlight.co/2020/06/25/big-surs-signed-system-volume-added-security-protection/.

Also, as you noticed, CoreDisplay apparently moved and i couldn't locate it yet.

The steps will probably be:

• Boot to Recovery
• Disable SIP
• Disable Authenticated Root (Requires FileVault disabled)
• Locate new CoreDisplay
• Reverse engineer new CoreDisplay & patch the pixel clock
• Bless new snapshot of now modified volume
• Boot to macOS

not working.
i get
`Olehs-MacBook-Pro:mac-pixel-clock-patch-V2-master oleh$ ./CoreDisplay-patcher.command
md5: /System/Library/Frameworks/CoreDisplay.framework/Versions/A/CoreDisplay: No such file or directory
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
SIP looks to be disabled, all good!

(otool) Detected unpatched CoreDisplay on OS X 10.12 16A313a.
SIP looks to be disabled, all good!
Patching CoreDisplay with patch version 1
Password:
Can't open /System/Library/Frameworks/CoreDisplay.framework/Versions/A/CoreDisplay: No such file or directory.
touch: /System/Library/Extensions: Read-only file system
Re-signing /System/Library/Frameworks/CoreDisplay.framework/Versions/A/CoreDisplay
/System/Library/Frameworks/CoreDisplay.framework/Versions/A/CoreDisplay: No such file or directory
Closing...`

[Xess]

Look like no hope to patch CoreDisplay in Big Sur.

I Just test opencore bootloader and override max-pixel-clock-frequency for intel. Now I got 4K/60Hz on Big Sur via mini displayport to HDMI 2.0 just like I had on Catalina(CoreDisplay Patch)

[duyleekun]

@Xess Did you modify max-pixel-clock-frequency or just use -igfxmpc(enable-max-pixel-clock-override)

https://github.com/acidanthera/WhateverGreen/blob/master/Manual/FAQ.IntelHD.en.md#hdmi-in-uhd-resolution-with-60fps

[Spirarel]

@Xess or @duyleekun can you explain how to do this?