macbookpro-a820663846de:~ user$ diskutil repairVolume disk1s2
Started file system repair on disk1s2 Macintosh HD
Checking file system
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Incorrect number of thread records
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Incorrect number of extended attributes
(It should be 186098 instead of 186099)
Incorrect number of Access Control Lists
(It should be 1395 instead of 1396)
Checking volume bitmap
Checking volume information
Repairing volume
Rechecking volume
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Incorrect number of thread records
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Incorrect number of extended attributes
(It should be 186098 instead of 186099)
Incorrect number of Access Control Lists
(It should be 1395 instead of 1396)
Checking volume bitmap
Checking volume information
Repairing volume
Rechecking volume
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Incorrect number of thread records
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Incorrect number of extended attributes
(It should be 186098 instead of 186099)
Incorrect number of Access Control Lists
(It should be 1395 instead of 1396)
Checking volume bitmap
Checking volume information
Repairing volume
Rechecking volume
Checking Journaled HFS Plus volume
Checking extents overflow file
Checking catalog file
Incorrect number of thread records
Checking multi-linked files
Checking catalog hierarchy
Checking extended attributes file
Incorrect number of extended attributes
(It should be 186098 instead of 186099)
Incorrect number of Access Control Lists
(It should be 1395 instead of 1396)
Checking volume bitmap
Checking volume information
The volume Macintosh HD could not be repaired after 3 attempts
Volume repair complete
Updating boot support partitions for the volume as required
Error: -69845: File system verify or repair failed
Underlying error: 8: POSIX reports: Exec format error
macbookpro-a820663846de:~ user$ fsck -fy
** /dev/rdisk0s2 (NO WRITE)
Can't open /dev/rdisk0s2: Permission denied
macbookpro-a820663846de:~ user$