Stegran

Hi Fabiosun, I removed the w6600 pro and tested using the integrated graphics. Unfortunately, the system still hangs at exactly the same point: This makes it appear that the GPU is not the cause of the problem. Thank you very much for all the you have put to helping me troubleshoot this. I truly appreciate your assistance, and I do not want to take up more of your time. I have already received far more help than I expected. Now that I have your EFI, I will continue testing and adjusting the BIOS and related settings carefully on my own. Hopefully, I can eventually get this system working. Best regards, Steven

Hi Fabiosun, Thank you for sharing your personal EFI. Even with your working configuration, the system hangs at the same point. I'm afraid my AMD Radeon Pro W6600 may be the culprit. I really appreciate your help. If you have any other ideas, I'm happy to test.

Hi Fabiosun, Let me try your last EFI. I posted without noticing it. With the previous omne I have done those steps, and unfortunately the system halted at the same point: "Successfully initialized AHCI controller" & non-verbose mode progress bar still freezes at roughly 50% under the Apple logo. Regarding the NVMe compatibility, I also tested the boot using a SK Hynix Platinum P41 NVMe PCIe 4.0 drive, but the boot sequence halts at the exact same point. Thank you

Hi Fabiosun, Thank you for the updated EFI. I've tested it with the CSM off, WiFi and internet disabled, but unfortunately the issue persists. I am installing from a full installer. Without verbose : Apple logo + progress bar stops at ~50%, & with verbose mode it hangs at "Successfully initialized AHCI controller".

Hi Fabiosun, Without -v as bootarg the installer reaches the Apple logo and progresses to about 50%, but after that it gets stuck and does not reach Disk Utility. I attached the EFI from my USB installer. Thank you very much for your time and taking a look. EFI.zip

Hi Fabiosun, I hope you're doing well. I've followed your X870E Hero thread for some time, and it inspired me to build a similar system. I finally have it assembled and tried to install Sequoia, but I'm stuck at the AHCI initialization point. My System Build: CPU: AMD Ryzen 9950X Motherboard: ASUS ROG Crosshair X870E Hero BIOS: 1715 RAM: GSkill 96GB (2×48GB) Storage: Crucial T705 NVMe (PCIe 5.0) GPU: AMD Radeon Pro W6600 (workstation) Using the OpenCore EFI you mentioned works for you and prepared for viljeml (BIOS 1715) The Issue: The system hangs at "Successfully initialized AHCI controller" during Sequoia boot and becomes completely unresponsive. What I've Tried: Removed RX 6950 XT GPU properties Tested with/without agdpmod=pikera Tried npci boot arguments (0x2000, 0x3000) Tested different USB ports, EFI versions, and minimal kext configurations, but every test results in the same hang point My Question: do you think the issue is that I'm using a W6600 Pro workstation instead of a GPU like your 6950 XT? Would switching to a consumer RDNA2 card likely resolve this? If you have any insight, I would really appreciate it. Thank you, Steven