Sometimes the mouse cursor stops responding or two finger scrolling doesn't work, this quick reset fixes that

reset-libvirt-qemu-kvm-tablet-input.sh

virsh detach-device --domain macOS-Simple-KVM --live --conf
ig <( cat << 'EOF'
    <input type='tablet' bus='usb'>
      <alias name='input3'/>
      <address type='usb' bus='0' port='2'/>
    </input>
EOF
)
sleep 2
virsh attach-device --domain macOS-Simple-KVM --live --conf
ig <( cat << 'EOF'
    <input type='tablet' bus='usb'>
      <alias name='input3'/>
      <address type='usb' bus='0' port='2'/>
    </input>
EOF
)