Running First Aid on "macOS Base System"

first_aid_log_1.txt

Running First Aid on "macOS Base System" (disk1s1)

NOTE: First Aid will temporarily lock the startup volume.

Verifying file system.
Volume could not be unmounted.
Performing fsck_hfs -fn -x /dev/rdisk1s1
Checking non-journaled HFS Plus Volume.
Checking extends overflow file.
Checking catalog file.
Checking multi-linked files.
Checking catalog hierarchy.
Checking extended attributes file.
Checking volume bitmap.
Checking volume information.
The volume macOS Base System appears to be OK.
File system check exit code is 0.
Restoring the original state found as mounted.

Operation successful.