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when boot bigsur to blackscreen, try to wait about half a minute. I need to wait about 30 seconds when boot Blackscreen, then it display apple logo again. I my 7559 laptap, bigsur boot seqence: boot menu->apple logo->black screen(26 seconds) -> apple logo->login.

sorry, xrandr --props, also you need disconnect all external display. use the python scripts in the attached file. the output is saved into display_info.txt, the run. python patcher.py

EDID may be different for different screen. this is mine: Please add it to DeviceProperties/Add/PciRoot(0x0)/Pci(0x2,0x0) like this: Create a new entry: AAPL00,override-no-connect (with type data) And set the value to...

download oc folder file, success to install big sur. works well: 4K display through EDID inject, intel ac 9260 using itlwn kext, touch screen(amazing) not worked: eth card, bluetooth.