FROM APPLE: "The user named root, or superuser, is a special user account ... that has unrestricted read and write privileges to all areas of the file system in OS X 10.10 or earlier. However, in OS X 10.11 or later, the root user’s write access to certain areas of the file system is restricted."
To enable root user permissions:
- Make sure you are on an Admin account
NOTE: These steps will only work from an Admin account
- Choose the Apple menu
- Select 'System Preferences'
- Select 'Users & Groups'
- Click on the padlock icon in the bottom left corner of the Users & Groups window
- Click on 'Login Options'
- Click on the 'Join' button in the Users & Groups window
- In the pop-up dialog window, click on 'Open Directory Utility'
- Once the Directory Utility program is opened, go to Edit > Enable Root User