Discover the volume identifier for your EFI boot partition.
Run this command:
The output should look something like this:
In this case, the volume identifier of the EFI partition is
2. Create a mount point.
A mount point is a directory where a non-booted volume is mounted. On Mac OS X, mount points are typically created in /Volumes. We can create a directory called efi within /Volumes by running the following command:
3. Mount the EFI partition at the efi mount point.
Run the command:
sudo mount -t msdos /dev/disk0s1 /Volumes/efi
That’s it. Your EFI volume will be mounted. Modify it at your own risk.