corrupt suid file
i was running disc utility and found a unrepairable suid core systerm file. so far all permissions have been repaired except this one.
iMac (21.5-inch Mid 2011), yosemite
Although it’s immensely popular, repairing permissions is pointless unless you have a specific indication of a permission error involving system files, which is rare, or a startup failure. It has traditionally spewed bogus warning messages that mean absolutely nothing.
The built-in help for Disk Utility reads in part:
If you see an alert or a message that says your permissions are set incorrectly, you can correct the disk’s permissions by clicking Repair Disk Permissions.
It’s justifiable, though rarely necessary, to repair permissions after running a third-party software installer, as defective installers have been known to damage the permissions of system files.
Mercifully, permission repair is obsolete in OS X 10.11 ("El Capitan"), so people who used to repair permissions can find a better way to spend their time.