I just managed to get to the installation menu of UmbrelOS in a virtual machine. My way:
- Choose one of the images as boot image (just as a placeholder, they do not seem to work with VMs)
- Flash umbrelos-amd64-usb-installer.img.xz on a physical usb drive with Balena
- Inject the usb drive into the VM
- Boot up the UEFI, it will not boot into the boot image
- Type ‘exit’ and enter
- Open boot menu
- Choose usb drive to boot into