--repair Repair permissions on files in the specified package(s).
In this sense, repairing permissions is sort of considered a form of hocuspocus with little benefit to most OS X situations, but nonetheless there are some unique circumstances where you may want to verify and repair disk permissions in OS X anyway, particularly if a files permissions are actually off, meaning the ability for certain users and processes to read and write particular files and folders.
Note this is not the same as verifying and repairing a disk.
Simply reboot the Mac again into Recovery Mode as directed above, but at the command line use the following syntax instead: Just as before, a reboot of the Mac is required for changes to take effect.
As previously stated, the vast majority of Mac users should leave rootless enabled and embrace System Integrity Protection, as most Mac OS X users have no business in the system level directories anyway.
Accordingly, rootless may cause some apps, utilities, and scripts to not function at all, even with sudo privelege, root user enabled, or admin access.
Again, the vast majority of Mac users should not disable rootless.Permissions differ on "usr/libexec/cups/monitor", should be drwxr-xr-x , they are dr-xr-xr-x .Repairing permissions may take a while, just like it did from Disk Utility.Adjusting this feature is really aimed at advanced Mac users, whether IT, sysadmins, network administrators, developers, tinkerers, security operations, and other related highly technical fields.The Disk Utility app has long contained the ability to verify and repair disk permissions on a Mac, but in the latest versions of OS X this ability has been removed.That doesn’t mean you can’t verify permissions and repair permissions in OS X El Capitan 10.11 and later however, you just need to turn to the command line to do so.