OS X 10.11: El Capitan - R.I.P. "Repair Disk Permissions"

OS X: El Capitan's Deletion of "Repair Disk Permissions" Could Impact You

Apple's next version of OS X El Capitan uses something called "System Integrity Protection" to prevent the alteration of critical system files. As a result, scripted installers and even privileged admin users can no longer change those UNIX file permissions and then modify them. This should make El Capitan more stable and secure. So, while "Repair Disk Permissions" is gone, that also creates an important issue for users: software upgrades.

The high level explanation for this analysis comes in the public beta release notes under Notes and Known Issues, Other:

System file permissions are automatically protected, and updated, during Software Updates. The Repair Permissions function is no longer necessary.

This change will generally go unnoticed by most average users except for the absence of that button in /Applications > Utilities > Disk Utility.app. A revised, better looking and easier to understand version of Disk Utility comes with El Capitan.

(MacObserver)

There is also a thread at Reddit that discusses the ins and outs of the new Disk Utility, with warnings for those who use the Terminal, among other issues.

Also: OS X El Capitan's Disk Utility is a mess | MacRumors Forums

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