How To: Disable El Capitan's System Integrity Protection

After running Apple’s latest version of OS X (10.11, El Capitan) on a couple of my Macs for about two months, I’ve become completely enamored with it. Now that the “Gold Master” seed is out for developers I updated all my Macs including my main production machine.* Even though El Capitan contains a few new features, it is (by Apple’s own admission) a “stability release”. By every measure OS X 10.11 is rock-solid stable…

…and fast!

To further this notion of stability, Apple has introduced a new feature called System Integrity Protection that prevents changes to key OS components and critical applications like Mail and Safari even if you’re logged in with administrator credentials.

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