1. Turn on "Enable access for assistive devices" option in System Preferences > Universal Access.
  2. Universal Access Enable access for assistive devices
  3. Double click RetroKeyboard.pref, it will be installed into System Preferences automatically.
  4. screenshot
  5. Choose keyboard profile and click start.


Just remove the RetroKeyboard.pref in

  • ~/Library/PreferencePanes,
  • /Library/PreferencePanes, or
  • /System/Library/PreferencePanes.