We want to offer OS images for Parallels desktop (virtualizer on macOS). So far we couldn't find a way to generate them via CI/CD pipeline on a Linux host, but need to import an image or appliance (for another virtualizer) into Parallels on a macOS system to have it doing the conversion to hds or pvm. Images and appliances for VirtualBox, VMware and Hyper-V can all be generated via gemu-img alone, so it would be convenient to use the same toolchain for Parallels and skip the need for a macOS system and the manual import step.
Best regards, Micha