System Preferences is the application for OS X that allows you to modify various system settings. Located in /Applications, the application is organized into different preference panes.
System Preferences will access preference panes in three default locations:
- /System/Library/PreferencePanes — default OS X preference panes
- /Library/PreferencePanes — user-installed preference panes installed globally
- ~/Library/PreferencePanes — user-installed preference panes just for a single user