"what to do if a future update will overwrite the boot.efi? "
if you access to a Mac you could remove the drive and fix it or after an update replace the files before rebooting.
If someone good at writing scripts could package this up so it was an installer that would be even easier.
if you access to a Mac you could remove the drive and fix it or after an update replace the files before rebooting.
If someone good at writing scripts could package this up so it was an installer that would be even easier.