I installed Ubuntu as dualboot for a specific task to a 30 GB partition. It worked, however I found out I could do the same thing in macOS, so I removed the 30 GB partition. I also wanted to remove Ubuntu files from the EFI partition, but diskutil no longer mounted the partition.
$ diskutil mount disk0s1
Volume on disk0s1 failed to mount
If the volume is damaged, try the "readOnly" option
$ diskutil mount readOnly disk0s1
Volume on disk0s1 failed to mount
If the volume is damaged, try the "readOnly" option
However, I can still mount the partition with the mount command and modify it's contents.
$ sudo mkdir /Volumes/EFI
$ sudo mount -t msdos /dev/disk0s1 /Volumes/EFI
I can also still boot into Windows, meaning the EFI partition is fine. Why is diskutil failing to mount this partition and how can I fix it? I also read that formatting the EFI partition will break future firmware updates, so I don't want to format it.
Here's the output of diskutil list:
$ diskutil list # Not the full output
/dev/disk0 (internal, physical):
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *500.3 GB disk0
1: EFI EFI 209.7 MB disk0s1
2: Apple_APFS Container disk1 425.1 GB disk0s2
Best Answer
Occasionally, you will encounter scarecrows. Here is one such example.
Observe:
The message is meant to scare you, thus the term scarecrow. Nothing is wrong, you just need to add
sudo.