Stuck with MP 3,1

[Peh4]

Hello, I think I'm so close to succed to install BigSur on my MP3,1 (more details bellow) but after postinstall and reboot i have this message : apfs_get_firmlink target_vnode:2007: vnode_lookupat(Library) failed with error 2

Hardware

• a usb key 32Go with BigMac2 on it
• a MB 3,1
• OWC Carte PCIe Accelsior S on a 4x PCIe slot with a ssd disk
• the original Graphic card : ATI Radeon RV 630 (i use it during the install process to see bootscreen)
• the GTX 670 i plan to use when all is done

What's strange/wrong

• i can't boot on BigMac2 or BigSur install process without Single User checked
• after the postinstall patch applied, and reboot, i have this error loop : apfs_get_firmlink target_vnode:2007: vnode_lookupat(Library) failed with error 2 x infinite Thu Sep 2 16:26:19 2021 localhost com.apple.xpc.launchd[1] (com.apple.opendlractoryd.466 <Warning>: Service excited with abnormal code: 70

What i tried

• zap PR RAM
• install GTX 670 and try to boot (but i can't see what's going on)
• redo postinstall with BigMac2 with various checkboxes

Any help would be usefull ;) Thanks

[Peh4]

Hello again,

I updated my graphic card to a GTX 680 with the proper boot screen. It's easier and i don't need to be in single user mode anymore. But still no succeed to install BigSur on this mac.

After BM2 pre-install I can launch the BigSur installer i let him finish Back to BM2 to post-install reboot and stuck again with the apple logo and loading bar about to 50%

What can i do next ?

[JB-1976]

i have the same problem please help

[SuperBox64]

OCLP

[SuperBox64]

Probably a race condition.