One way to disable the built-in keyboard mac
Powerful karabiner, very easy to use.
Directly in the presence of an external keyboard connected, the built-in keyboard disable the swap
Another method is to enable mac mouse button, the feeling is not very useful, not all disabled modifying health.
So I you can have fun on my mac laptop to work. ~~
Reference following address:
http://www.mackungfu.org/cat-proofing-a-macbook-keyboard
The main interface records about: (see Operation below)