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MP 1,1-5,1 Mac OS 11.3 has broken support for older Mac Pros
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Can the 3,1 bootrom be dumped? Or maby a closer inspection of dosdudes apfs patch?
It's not DosDude's APFS patch (which is just a shell script) but those with an APFS JumpStart driver injected into the firmware. This driver is for cMP5,1 in the first place ... typically extracted from the Mojave installer. Done the procedure myself.
EDIT: I see we mean the APFS Firmware Patcher which is not just a shell script.
Would think it is the NVMe driver injected into firmware that's more likely to be relevant but I think that is a cMP5,1 driver as well IIRC.
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What's in there? Actually never tried the Catalina patcher. Assumed it was the same as the Mojave one in this respect.
EDIT: I see we mean the APFS Firmware Patcher which is not just a shell script. Need to see what the Plist file contains (Seems to just be mapping files to models ...looks like something for the tool to know which file to use for which model)
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You said you ran it:
APFS ROM Patcher
Ran it just fine on my 3,1 MacPro. Intel chipped of course as per the dire warnings in HrutkeyMods' video.
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I'm the one who originally stated it's 3,1's with the NVMe patch, not the APFS patch. eVasillis mis-quoted me. 
PS - That discussion was in the "OpenCore - on the Mac Pro" Facebook group. There are a lot of conversations taking place in a lot of groups, so sometimes difficult to trace context.
PS - That discussion was in the "OpenCore - on the Mac Pro" Facebook group. There are a lot of conversations taking place in a lot of groups, so sometimes difficult to trace context.
So which nvme.ffs you are using?I'm the one who originally stated it's 3,1's with the NVMe patch, not the APFS patch. eVasillis mis-quoted me.
I own a 3,1 but do not own any NVMe drives, therefore I'm not using anything. I've been following a lot of discussions in many places, and all of the 3,1's that are running 11.3 successfully have the patch that allow NVMe booting. Whatever's in that patch may hold the key to the problems with our 5,1's.
Searching MacRumors, I found this link for 3,1 NVMe booting:
Mac Pro 3,1 NVMe support + Upgrade Guide + Questions
Hello everybody! I'm newly owner of MP 3,1 and I want to discuss upgrading of this nice but old machine with you. I suggest everyone to take part in creating this guide. Now I will post my achievement in making it bootable from NVMe SSD. Bootable NVMe Note: it can be dangerous for your MP...
forums.macrumors.com
Yes that is just extracted ffs from MP6.1 firmware. I have the same one. This is ruled out then.I own a 3,1 but do not own any NVMe drives, therefore I'm not using anything. I've been following a lot of discussions in many places, and all of the 3,1's that are running 11.3 successfully have the patch that allow NVMe booting. Whatever's in that patch may hold the key to the problems with our 5,1's.
Searching MacRumors, I found this link for 3,1 NVMe booting:
Mac Pro 3,1 NVMe support + Upgrade Guide + Questions
Hello everybody! I'm newly owner of MP 3,1 and I want to discuss upgrading of this nice but old machine with you. I suggest everyone to take part in creating this guide. Now I will post my achievement in making it bootable from NVMe SSD. Bootable NVMe Note: it can be dangerous for your MP...
This has the clarity that has been missing from most of the reports so far. I don't think there is a difference between 3,1 and 4,1/5,1 on the issue afterall as none of reports of success on 3,1 clearly and explicitly state they are booting from a drive on a PCIe Slot.
I believe @JohnD is on a 3,1 (nothing in signature) ... is that the case?
EDIT: Now clearly and explicitly confirmed:
macOS 11 Big Sur on Unsupported Macs Thread
Yes, it is booting from a Samsung 970 Evo NVMe connected to one of the cMP 3,1 PCIe x16 slots via a Highpoint 7101A-1 SSD card (not a cheap card at around $250)
forums.macrumors.com
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Absolutely right! NVME patch not the APFS one...I'm the one who originally stated it's 3,1's with the NVMe patch, not the APFS patch. eVasillis mis-quoted me.
It seems that 11.4 introduces other (related?) issues hampering successful booting. Here's some data:
Setup
Setup
- Mac Pro 5,1 with no north bridge PCIe devices except for an RX 580 video card
- Clean install of 11.4 on a SATA disk by running the installer in 11.2.3
- Usually the boot hangs or shows the prohibitory symbol
- Boots successfully maybe 30% of the time
- The same installation always boots when moved to a supported Mac
- Interestingly, the first boot after moving the installation back is successful
I can confirm that the hanging persists even with no_compat_check. The prohibitory symbol is difficult to check because it occurs rather infrequently.
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