Mac OS X 10.6: Specifying a keyboard type
When you connect a keyboard that is not immediately recognized, Keyboard Setup Assistant automatically opens so that you can specify the keyboard type (ANSI, JIS, or ISO). There are three keyboard types that Mac OS X recognizes: ISO (Europe), JIS (Japan), and ANSI. The ANSI keyboard is a standard 101-key layout widely used in the U.S., North America, and many other parts of the world.
If you’re having trouble with your keyboard, you may need to specify the type manually. You can use Keyboard preferences to open Keyboard Setup Assistant and specify the keyboard type.
To specify the keyboard type:
Choose Apple menu > System Preferences, and then click Keyboard.
Click Change Keyboard Type.
Follow the onscreen instructions when Keyboard Setup Assistant appears.