Success with Gigabyte H370M DS3H +i5-8400 coffee lake

[JingleDjango]

Try the attached 0.7.7 OC folder you need to replace the Replace in the config.plist with your settings you use now for the serial, MLB and SystemUUID as I removed them from my working configuration. It is setup as iMac19,1 using the intel for computing tasks with my rx560 providing the connections for my monitors.

Edit: And I think I remember something about the XHCI port limit needing to be disabled for the Monterrey I have the ports mapped with the .kext in there for it the files included, not clue whether I have in disabled in the .plist did not check.

Edit2: You need to be running at least Catalina 10.15.4 for it to boot as that is the minimum version set in the .plist.

May I ask what BIOS version you're on and what settings you're using? I tried your EFI (disabled XHCI Port Limit and populated the system profile) but on booting the installer I keep running into the following error:

authenticate_efi_forwarded_roothash:2809: apfs_extract_root_hash_and_manifest failed with error: Invalid argument (22)

EDIT: I was able to resolve this by plugging into a USB2 port on the rear panel rather than the chassis USB3 port. I haven't tested everything yet but Monterey installed smoothly. Thank you for the EFI.