EFI/APPLE/FIRMWARE/MBP112_0138_B18_LOCKED.scapĬontains a copy of the latest EEPROM firmware update installed. If you deleted it and there is no problem, the system will still restore it on certain occasions (not on every boot but on every system update for instance). In case you accidentally deleted it and this causes trouble, you can easily restore it as long as you still have a way to mount the EFI partition and copy the file there from another macOS installation.

The older your Mac is, the more likely it will depend on that file being present during boot. And if your Mac is somewhat recent, it will also boot without that file as it already has (most or all of) those extensions embedded into its EEPROM firmware. So even if your Mac fails to boot that version of macOS without that file, it may still be able to correctly boot an older version from another partition or disk. Yet all of the above always only applies to the version of macOS that this file came from. If you delete that file, your Mac may fail to boot macOS from that drive. It is even required in some cases to perform a recovery installation over the Internet or booting over a local network. In some cases it must change the state of hardware at boot time otherwise the hardware will not work correctly or not work at all. Some Macs also require it as without that file they cannot boot from external drives or only from some kind of those. because it cannot boot from an APFS file system otherwise. This file contains EFI extensions that your Mac may need to boot, e.g. You can also find it at the following location when booting that macOS system: Is the EFI extension that shipped with the latest operating system installed on that disk.

Macbook pro 2016 scbo file