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
hardwarekeyboard
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Best Answer
Install Karabiner
Choose your external keyboards on Devices > Advanced.
Check the corresponding box
Source