Matcha

Matcha runs macOS in a proxmox VM with an OpenCore BIOS that contains an SMBIOS setup for iMacPro1,1 which matches my AMD Ryzen 9 3900X 12-core processor well enough.

See here for more info:

💉 m@cast  [~/apps/macOs-on-proxmox] 
# ^ see readme.txt and install.sh
matcha HOME / apps
EFI Agent > icon in toolbar > EFI drive > mount > browse to OC > config.plist