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I've attached the `ioreg` output. For EFI I assumed you needed the contents of the EFI partition, so I've upload them using a service (too big for the forum to share): EFI: https://we.tl/t-mdxDqAyIxb For `kextcache` apparently some settings are required, what do I need to run exactly? (I did...

Thanks for your input, Maybe I'm a bit uninformed, what exactly do you mean when referring to PR files?

I'm not sure, 11.1 worked fine. I directly updated to 11.4. Is there any known way of resolving this issue?

11.4 after upgrade.

The system does not (always) boot correctly and get stuck in the loading screen, sometimes shows a generic boot error. In verbose mode: if it gets stuck. Typcally the last lines are somwhat like: Intel82574l::start - Built <date> -- running on device at <id> Intel82574l::start - Built <date> --...

Thanks, you've been of great help. After - recreating the install media. - patching the intstaller - running setvars - turning off SIP (not sure if this was required) - patching kexts The wifi seems to work again beautifully. I did encounter a new issue though. The machine seems to have...

Thx, how do I do this exactly? Do I repeat this step?: https://elitemacx86.com/threads/how-to-install-macos-big-sur-on-unsupported-mac-pro-macpro3-1-mac-pro4-1-and-macpro5-1.601/#post-3838 I think I need to go some other steps back then, I think I need to make a new installer?

I've attached them to the post.

I think it is "pci14e4,432b" (https://devicehunt.com/view/type/pci/vendor/14E4/device/432B) but I'm not exactly sure. I tried to find out using I'm not exactly sure how to find out using `ioreg -r -n ARPT`. I'll list the output: ioreg -r -n ARPT +-o ARPT@0 <class IOPCIDevice, id 0x1000001b7...

Today I tried to upgrade my Mac Pro 5.1 from a fully working Open Core Big Sur 11.1 install to 11.4, after the install seemed to have stalled and I rebooted the OS seems to boot fine, everything except the WiFi works. The WiFI doesn't, it did on 11.1. Connecting an ethernet cable provided...