Requiring administrator password to change system settings prevents other users on the computer
them without your knowledge.
Why you should enable it
If you hand over the computer to someone, they can't change your system settings.
Time to fix
How to fix
- Open System Preferences, click Security & Privacy, then the tab General.
- Click the lock icon in the bottom-left, then enter the account password.
- Click Advanced in bottom right.
- Check Require an administrator password to access system-wide preferences.