Symptom – Running the OSX Disk Utility program and selecting Verify Disk permissions results is multiple error of ACL found but not expected on [filename]” While these errors can be safely ignored (ACLs are Access Control Lists) it does make reading the results of the disk verify difficult. Fix – Fletcher Tomalty has written a python script that can be run from the command line to remove these unexpected ACLs. The script uses the OSX Disk Utility to find the files and then does a sudo chmod -h -N on each of them. I have used it successfully on Mountain Lion 10.9.9.