Is it possible to completely disable the built-in keyboard on a MacBook? No input should be possible from that keyboard when I connect an external keyboard. This is sort of possible with the trackpad and the mouse, is there an option (or indeed a hack!) to do the same with the built-in hardware?
From Googling around, I found this page.
It suggests that you unload a
This will prompt you for your password and then give some errors, but it does disable the built in keyboard (tested on my ML 10.8.2)
To re-enable the builtin keyboard, load the kext file again:
BTW, I noticed that this immediately prints all that was typed on the builtin keyboard, so be ready for this (in Terminal this should probably just output some text).