출처 : http://palmer.im/2013/01/remap-keys-os-x-mountain-lion/

1. Download KeyRemap4MacBook; it's pretty much the only decent key remapper for Mac. Despite its horrible name, it is insanely flexible and powerful.
2. Install KeyRemap4Macbook as per the instructions on their website.
3. Download PCKeyboardHack if you want to remap the Caps Lockkey.
4. Open PCKeyboardHack (from the Launchpad), and under the Caps Lock section select Change Caps Lock.
5. Change the keycode in the right hand column to '110'.
6. Open KeyRemap4MacBook (it's in System Preferences).
7. Scroll down to 'For PC Users', expand it, expand 'Change PC Application Key'.
8. Select whatever key you want the Caps Lock key to remap to (I set it to 'Application Key to Command_L').