- Install the latest Apple software updates.
- If you have been using a blank password to log in to your Mac, change your password in Users & Groups preferences. Don't use a blank password.
Your Mac asks you to enter the name and password of an admin account when it needs to verify that you have permission to make changes. For example, you must authenticate as an administrator when you click the lock in System Preferences, enter certain commands in Terminal, or set a firmware password.