Thank you very much for sharing, it runs almost perfectly on my machine

But there is a small problem (on my machine).

After booting, the screen will be black for a while before entering the system (essentially it is dimmed, you can see faint light)
The connected external monitor can be directly bright, and there is no problem of black screen and dimming

Thanks for sharing this wonder, I used it on my Dell 7580 notebook with bigsur beta 9 and it was almost perfect, just missing the network kext, but I couldn't add it. Could you add or explain how I can do this?

Hi, have you got SD card working?

Thanks for sharing your EFI, working very nicely on my 7580.

But HDMI isn't working. Is it working on your system?

Also, have you tried updating to Big Sur?

Very nice job, thank you! It works very well on my Dell 7580. Could you please upgrade airportitlwm and OpenCore to the latest version, which may have some useful improvement.