Information Technology Reference
In-Depth Information
You Can't Change Some Options in System Prefer-
ences
When you open System Preferences and click an icon, you may find that some or all of the controls in the res-
ulting preferences window are disabled. This actually isn't a glitch or a bug at all. Instead, it's a security feature
designed to prevent unauthorized users from making changes to sensitive system settings. (It's also designed to
prevent you from making certain changes without at least having to think about them first.) For example, Figure
12.1 shows what the Parental Controls preferences look like when a user without authorization displays the win-
dow.
