message: fix(docs): Update macOS contributing info
  Changelog-entry: Update docs
  Change-type: patch
diff: @@ -52,10 +52,12 @@ The following MinGW packages are required:
  - `msys-bash`
  - `msys-coreutils`
  -#### OS X
  +#### macOS
  -- [XCode](https://developer.apple.com/xcode/) or [XCode Command Line Tools],
  -which can be installed by running `xcode-select --install`.
  +- [Xcode](https://developer.apple.com/xcode/)
  +
  +It's not enough to have [Xcode Command Line Tools] installed. Xcode must be installed
  +as well.
  #### Linux
  @@ -213,4 +215,4 @@ Don't hesitate to get in touch if you have any questions or need any help!
  [EditorConfig]: http://editorconfig.org
  [shrinkwrap]: https://docs.npmjs.com/cli/shrinkwrap
  [hxd]: https://github.com/jhermsmeier/hxd
  -[XCode Command Line Tools]: https://developer.apple.com/library/content/technotes/tn2339/_index.html
  +[Xcode Command Line Tools]: https://developer.apple.com/library/content/technotes/tn2339/_index.html
  