I am on macOS as well and the diacritics I mentioned ("a → ä, `a → à) work out of the box with the "US International PC" layout. If I press ⌥a I get å with my l

I am on macOS as well and the diacritics I mentioned ("a → ä, `a → à) work out of the box with the "US International PC" layout. If I press ⌥a I get å with my layout.