I would like to use Opt+ and Opt+ as hotkeys in some apps but when I try to use them, they still behave as beginning and end of line. How do I unset the OS's bindings for these key combos?

I would like to do this without using Karabiner.

1 Answer 1


If ${HOME}/Library/KeyBindings/DefaultKeyBinding.dict doesn't exist, create it as:


Add the following to ${HOME}/Library/KeyBindings/DefaultKeyBinding.dict between the braces:

    "~\UF702"  = "noop:"; /* OPT+LEFT_ARROW: NOOP */
    "~\UF703"  = "noop:"; /* OPT+RIGHT_ARROW: NOOP */

For more info about the syntax see the article Mac OS X Keybinding Key Syntax.

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