I ran the latest OpenCore from the link in the YouTube description. I'm on a Mac Pro 5.1 running Mojave, using a Radeon vii.
Everything went great, and I got the boot picker when I rebooted. However, choosing my boot drive (Samsung SSD in a pcie card, not NVME) sends me to hang on a white screen with the Apple logo. I can boot into the recovery partition, though.
Resetting the PRAM didn't work.
Nor did removing the SSD and resetting the PRAM.
Restoring the original GPU and booting whilst holding option takes me to a blank white screen with a moveable mouse cursor.
Trying to reinstall the OS came back with "Your Mac needs a firmware update in order to install to this volume. Please select a Mac OS Extended (Journaled) volume instead"
Disk utility wouldn't let me erase any drives to anything except AFPS, but I found a terminal command which unlocked extended journaled as an option. I formatted an old drive back to journaled, and ran the Mojave installer from the recovery partition.
The installer ran up until the point where it restarts. Got the boot picker again, this time with the new drive. Buuuut trying to select that drive returns an error of "MacOS could not be installed on your computer. An error occured while verifying firmware. Quit the installer to restart your computer and try again."
Hoping someone can shed some light on this for me.