Setting a Login Password for Mac OS X 10.5 and 10.6

Apple Launches Biggest Upgrade To Mac OS X
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Setting a login password to prevent unauthorized access to your computer is easy on Mac OS X 10.5 (Leopard) and 10.6 (Snow Leopard), as well as later versions.

Although originally written to pertain to Mac OSX 10.5 and 10.6, the instructions here are the same for the latest version of macOS (currently, version 10.14, Mojave).

Getting Started

  1. Click the Apple icon in the upper-left portion of the screen, and choose System Preferences.
  2. Select Accounts (or, in later versions, Users & Groups).
  3. Select Login Options.
  4. Using the drop-down, change Automatic login to Disabled.
  5. Choose how you want the password prompt to appear: as a list of users or a prompt for both name and password.
  6. Click Guest Account, and uncheck the boxes that read Allow guests to log in to this computer and Allow guests to connect to shared folders.
  7. To save these changes, just close the Accounts window.

Tips and Advice

Now that you've set your password, you should: