How to keep someone from changing settings on a Mac

I have a friend that uses my computer when I'm not around and tends to change my settings and the overall look of the screen. Can anyone tell me how I can keep this from happening?

Set up Accounts to where they can only Login to a User Account that does not have access to the Admin System Preferences.
see > Mac OS X: Setting Up User Accounts
and/or > Mac OS X Tutorial - Setting up user accounts - YouTube

Similar Messages

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    Set up Accounts to where they can only Login to a User Account that does not have access to the Admin System Preferences.
    see > Mac OS X: Setting Up User Accounts
    and/or > Mac OS X Tutorial - Setting up user accounts - YouTube

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