A downloader for macOS disk images from Apple System Update Service (SUS) also known as SWScan.
This is a "port" of https:/foxlet/macOS-Simple-KVM (really, a rewrite)
The DMG download part is done, the DMG to IMG part is in progress and the Qemu wrapper part is to be done.
DMG2IMG: https:/Lekensteyn/dmg2img