message: doc: note that brew installed qt is not supported
diff: @@ -138,6 +138,14 @@ Skip if you don't intend to use the GUI.
  brew install qt@5
  ```
  +Ensure that the `qt@5` package is installed, not the `qt` package.
  +If 'qt' is installed, the build process will fail.
  +if installed, remove the `qt` package with the following command:
  +
  +``` bash
  +brew uninstall qt
  +```
  +
  Note: Building with Qt binaries downloaded from the Qt website is not officially supported.
  See the notes in [#7714](https://github.com/bitcoin/bitcoin/issues/7714).
  