Computers, Laptops & Tablets Apple Setting a Login Password for Mac OS X 10.5 and 10.6 By Mary Landesman Writer Mary Landesman is a former freelance contributor to Lifewire and a security expert. She was named as one of the women to watch in IT security. our editorial process LinkedIn Mary Landesman Updated December 04, 2019 Win McNamee / Getty Images Apple Macs iPad Tweet Share Email 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 Click the Apple icon in the upper-left portion of the screen, and choose System Preferences.Select Accounts (or, in later versions, Users & Groups).Select Login Options.Using the drop-down, change Automatic login to Disabled.Choose how you want the password prompt to appear: as a list of users or a prompt for both name and password.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.To save these changes, just close the Accounts window. Tips and Advice Now that you've set your password, you should: Configure the general security settings to take full advantage of your system password.Turn on and configure the Mac OS X firewall.Check out this guide to setting up your new Mac computer.