Adding External USB Numeric Keypad to MacBook Pro
I added an external silver numeric Targus USB keypad (Model: PAUK10U Item: 10 from Office Depot) and initially had a problem with the MBPro recognizing it. It now is functioning normally. Here's how I did it:
When you first plug it in, the MBP will recognize a keyboard was added via USB. The "press the key to the right of the fn key" instruction will not work since there is no fn key on the external keypad as there would be on a keyboard.
If you have already gone through this step or closed out the dialog box accidently, you can find it in Apple>System Preferences>Keyboard & Mouse>Keyboard>[Change Keyboard Type]>[Continue]>(hit any key)>[Skip]>[ANSI(United States)]>[Done]. Follow these steps if you are currently at this initial newly found keyboard dialog box as well.
You may notice that when in Excel, a number will appear momentarily, but not register. To correct this, press the Num Lock key ON THE EXTERNAL KEYPAD and while holding it down, press a number key. Then release the Num Lock key. The Num Lock LED will remain on during this procedure and you hopefully will find that all keys function normally as marked in or out of Num Lock mode.
Best wishes, Bugs
MacBook Pro 12/2007, Mac OS X (10.5.2)