Mapping the caps lock key win vim

I am trying to map the caps lock key to开发者_StackOverflow do an action in MacVIM, but I cannot figure out how to map that key.

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It is not possible (unless there are big changes in mac version): vim uses outdated byte queue instead of keypress queue and CapsLock is not represented by any byte sequence.

// It is still possible to configure your system so that CapsLock will produce something that can be captured by vim.

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This SO question: Using Caps Lock as Esc in Mac OS X has some suggestions, which they characterize as a choice between "a complicated, half-baked solution or installing a third-party piece of hackery."