Step 1: Open System Preferences
Click Accounts in System Preferences and select your account. Click the padlock and enter your admin password to enable changes to be made.
Step 2: Review your password
Make sure your password is unusual and not easy to guess, like your name or pet’s name. And certainly not that it is ‘password’ or left blank.
Step 3: Use password help
To generate a random password, click on the key icon. You can choose from easier to remember ones or truly random ones. Click to edit the password manually.
Step 4: Go to Login Options
Click on the Login Options button and turn off Automatic Login. This will stop the Mac from zipping straight to your Desktop when you boot it up.
Step 5: Change Login Display
If you display the Login Window as a list of users, people may be able to guess your password. Switch it to Name and Password to avoid showing usernames.
Step 6: Hide the buttons
Untick the ‘Show… buttons’ option and anyone trying to access the Mac without logging in won’t be able to restart, sleep or shut it down using the mouse.
Step 7: Turn off password hints
If you turn off password hints, any that you’ve entered in the Password section won’t be shown. This makes it much harder for someone to guess your password.
Step 8: Show Input Menu
If ‘Show input menu in login window’ is ticked, anyone logging in can use foreign characters not on a regular keyboard – helpful if your password contains them.