When you try to start a virtual machine with EFI using Virsh, the following message appears:
virsh start macos-manual error: Failed to start domain macos-manual error: operation failed: unable to find any master var store for loader: /var/lib/libvirt/qemu/nvram/OVMF_CODE.fd
Solution:
Install the package "ovmf"
apt install ovmf
Editing QEMU configuration file
vim /etc/libvirt/qemu.conf
Add the following line:
nvram = [
"/usr/share/OVMF/OVMF_CODE.fd:/usr/share/OVMF/OVMF_VARS.fd"
]
Restart libvirt
systemctl restart libvirt-bin