Any Mac user who has upgraded to Catalina may have noticed that there is now no easy way of playing MIDI files, unless you load them into a Logic or Garageband.
(The old QuickTime Player v7 is 32-bit; the new QuickTime Player X opens MIDI files, but won't actually play them! )
Anyway, if you want a lightweight app that will play MIDI files, I've written one, and you can download it here:
https://github.com/benwiggy/APPlayMIDI/releases
As an added bonus for Finale users, you can Copy any loaded MIDI file onto the clipboard, and then paste it into a Finale document using MIDI/Audio > MIDI Clipboard > Import MIDI from Clipboard.
It's scraping the limits of my programming abilities, but is mostly entirely boilerplate code, so shouldn't cause any trouble.
OT: Little MIDI app for MacOS
Moderators: Peter Thomsen, miker