Final answer:
To set restrictions in Mac OS X, access 'System Preferences' from the Apple menu, click on 'Parental Controls,' select the user account to manage, and enable the restrictions by checking 'Enable Parental Controls.'
Step-by-step explanation:
To set restrictions in Mac OS X, you should follow these steps in order:
Open "System Preferences" from the Apple menu.
Click on "Parental Controls."
Select the user account for which you want to set restrictions.
Click on the "Enable Parental Controls" checkbox for that user account.
By following these steps in the specified order, you will be able to successfully set up the necessary restrictions for a user account on Mac OS X.