If the permissions on your MacOS Sierra system seem broken, the OS comes with a utility you can use to repair the permissions. Here’s how it’s done.
For those of you familiar with the “Repair Disk Permissions” option that used to be located under “Utilities” > “Disk Utility” > “First Aid” in older versions of MacOS, you may notice this option is gone in MacOS Sierra. Instead, you have to perform these steps in Terminal.
- From the Finder, select the “Go” menu, then choose “Utilities“.
- Open “Terminal“.
- Type the following command, then press “Enter“:
diskutil resetUserPermissions / `id -u`
The system will then verify and repair permissions.