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It works fine now. During the installation of Sequoia I needed to connect via HDMI. But now DP works great.

Thanks for this. I added the arguments, but I think the problem is that it doesn't detect the DisplayPort connection to my screen (AMD GPU = RX6800XT). I've now connected it to one of the HDMI ports on my RX6800XT and now I have vision... (it's installing at the moment...). I will try to...

I did everything in the post you mentioned and more, as far as I can see. I can't get it to work. Can you advise based on the EFI I've attached?

I want to play around with Sequoia, but whatever I try, I'm keep getting a black screen after the opencore picker and therefore I can't get to the installation screen. Hardware: Intel Core i7 9700K (Coffee Lake) Gigabyte Z390 Designare Corsair Vengeance LPX 32GB DDR4 RX 6800 XT Crucial MX500...

I've been using this for many years now, unsure if it's 100 percent required, but better safe than sorry. Quoting from: https://scriptingosx.com/2018/10/include-assets-in-external-macos-installer-drives/

I recommend to use this command to create a Sonoma USB installer: sudo /Applications/Install\ macOS\ 14\ beta.app/Contents/Resources/createinstallmedia --volume /Volumes/USB —nointeraction —downloadassets

I'm getting this:

PR files? What is that sir? No, I haven't patched the system kexts using OCLP.

I'm not getting the acceleration from my HD4600. Any idea what I'm doing wrong? Please find attached my anonomized EFI. Hopefull you can make the required changes?