Numpad On External KB I use an external apple keyboard with a numeric pad but its number keys don't produce numbers, in fact they produce nothing. The plus, hyphen, enter buttons do work even 0x47 keypad-numlock but it does not toggle on the numeric buttons. This is my keyboard:

  Product ID:   0x0221
  Vendor ID:    0x05ac  (Apple Inc.)


Please advise.
Num Keys did not work because I had Mouse Keys enabled. 

To disable it:

Open  Apple menu and choose “System Preferences”, then go to “Accessibility”
Select “Mouse &amp; Trackpad” and untick the option called “Enable Mouse Keys”