I'm trying to swap Ctrl and Fn on Catalina without downloading a new app. As suggested in multiple articles, I tried going to System Preferences > Keyboard > keyboard > Modifier Keys.. in hopes to simply swap the function of two keys. However, Fn is missing from the list of modifier keys. Am I missing something here? Do I need to do something else to make Fn key show up there?

EDIT: I'm using Macbook Pro with touch bar.

  • What keyboard do you have. I see 5 keys on the modifier dialog. (albeit Mojave) including function key, but function only appears on the function key's set of choices. – mmmmmm Oct 17 '20 at 15:23
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    If we don't get an answer re Apple software you can use the third party free Karabiner karabiner-elements.pqrs.org – mmmmmm Oct 17 '20 at 15:25
  • I've a keyboard with a touch bar (now updated in the question). I was trying to avoid using Karabiner, but I don't think I'm out of choices. Thanks for the help! – mindreader Oct 19 '20 at 4:04

From Apple documentation (Change the behaviour of the modifier keys on Mac)

On macOS 10.13 and later, you can also change the behaviour of the Function key on keyboards that have an Fn key – except keyboards with a Touch Bar.

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    Yes but you can't change any other key to the function key – mmmmmm Oct 17 '20 at 15:23
  • I think this is what I missed. I do have a keyboard with a touch bar. That explains why I don't see the Fn key there. Thanks a ton! – mindreader Oct 19 '20 at 4:02

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