virt-manager uses BIOS as the default option for firmware. There is an option to change this to UEFI just before installation, after the volume is set up.
However, after installation, the dropdown menu for changing the firmware disappears.
The installed system boots only with
UEFI and not
BIOS. The installation was a cumbersome procedure and I would like to avoid doing it all over again if possible.
Is there a way to convert the firmware to UEFI while keeping the contents of the system (disk) intact?