Mac OS X 10.11 “El Capitan”
What happened to…?
OS X 10.11 “El Capitan” brings several important features to the Mac, but it also removes a few. Here are three things people are missing in El Capitan that I’ve been hearing about the most: Repair Permissions, Dashboard, and Secure Empty Trash.
1) What happened to Disk Utility? I can’t repair permissions anymore!
Correct - Apple has removed the Verify and Repair Disk Permissions functions from Disk Utility. The command line program ‘diskutil’ has also had those functions removed.
Apple changed OS X so developers can no longer assign permissions to files and folders that their software installs. Therefore, repairing permissions is no longer necessary. This is a very good thing!
2) What happened to Dashboard? It’s gone!
No it’s not, Apple just leaves it off by default now. It’s very simple to get Dashboard back if you use it:
Open System Preferences. Click...
If you have a Mac that runs OS X, then there's a simple maintenance procedure you can perform that will help to keep things running smoothly. It's called repairing permissions, and can be done using the built-in application called Disk Utility, located in Applications/Utilities.
OS X is based on UNIX, a very versatile, robust and powerful operating system. It's what runs the Internet. It's what got us to the Moon. And a modern version of it is what runs your Macintosh.
UNIX is based on Permissions. It must know which user has which rights for each file and folder (directory). If permissions for the files that run the System get messed up, bad things can happen. It could be as annoying as one application not launching, or as catastrophic as not booting anymore.
Fortunately, Apple allows you to repair the permissions for the System, but they really don't tell you how or why. I just told you the why, now you need to know when, and how.