The helpfulness of verifying and repairing file permissions in OS X is debatable , and in OS X El Capitan, Apple’s removed the option from Disk Utility altogether, favoring repairing permissions automatically. Some crazy circumstance might come up where you have to do it manually though, which is why OS X Daily points out the command line method is useful. Read more…
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Verify and Repair Permissions from the Command Line in OS X El Capitan
