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?
![How to disable the built-in MacBook keyboard?](https://cdn-ak-scissors.b.st-hatena.com/image/square/f105dec0822bf4ed8289c827c3babbeba1e5174d/height=288;version=1;width=512/https%3A%2F%2Fcdn.sstatic.net%2FSites%2Fapple%2FImg%2Fapple-touch-icon%402.png%3Fv%3Db514451ec60c)