hi dear cummunity   I wrote small instruction for many users, who use hypervisor QEMU\KVM (best for me config in attach "XML")   download loader convert synoboot.img to qcow2 qemu-img convert -f raw -O qcow2 synoboot.img synoboot-qcow2.img create VM with $your-name-vm open config file with $your-name-vm virsh edit $your-name-vm edit CPU <cpu mode='custom' match='exact'> <model fallback='allow'>