In macOS Big Sur and onward there is a built-in accessibility tool for text-to-speech, a floating window with play/pause/speed buttons that can read aloud almost any selectable text on screen. Have your Mac speak text that’s on the screen refers to this box as the 'TTS controller'.
However, in earlier OSes, TTS exists but there's no equivalent GUI popup.
Does anyone know of a way to make it (or something like it) appear on earlier OSes?
