Montery

EFI found at IODeviceTree:/efi
Will need to copy 8388608 bytes to EFI system partition
No auxiliary booter partition required
System partition found
Preferred system partition found: disk0s1
Returning booter information dictionary:
{
    "Auxiliary Partitions" =     (
    );
    "Data Partitions" =     (
        disk1s5s1
    );
    "Preboot Volumes" =     (
        disk1s2
    );
    "System Partitions" =     (
        disk0s1
    );
}
Substituting ESP disk0s1
Mounting at /Volumes/bless.HhYh
Executing "/sbin/mount"
Returned 0
Creating /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE if needed
Deleting previous contents of /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE
Deleting /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE/MBP121.fd (8388608 bytes)
Opened dest at /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE/MBP121.fd for writing
preallocation not supported on this filesystem for /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE/MBP121.fd

/Volumes/bless.HhYh/EFI/APPLE/FIRMWARE/MBP121.fd created successfully
Relative path of /Volumes/bless.HhYh/EFI/APPLE/FIRMWARE/MBP121.fd is \EFI\APPLE\FIRMWARE\MBP121.fd
IOMedia disk0s1 has UUID FFDC4D3D-09B0-4D83-974B-8C547C181C13
Executing "/sbin/umount"
Returned 0
Write to RTC: 0
Setting EFI NVRAM:
{
    "efi-apple-recovery" = "<array><dict><key>IOMatch</key><dict><key>IOProviderClass</key><string>IOMedia</string><key>IOPropertyMatch</key><dict><key>UUID</key><string>FFDC4D3D-09B0-4D83-974B-8C547C181C13</string></dict></dict><key>BLLastBSDName</key><string>disk0s1</string></dict><dict><key>IOEFIDevicePathType</key><string>MediaFilePath</string><key>Path</key><string>\\EFI\\APPLE\\FIRMWARE\\MBP121.fd</string></dict></array>";
}
marcel@Marcels-MacBook-Pro ~ %