Okay, today I tried it and wanted to leave a short note about it.
Long story short, there’s a good reason for not having a MacOS export, Godot Valet is just not ready-to-use for MacOS users.
It needs some adjustments in the version manager part of Valet at least. Selecting the path to Godot executable in the create-godot-version-dialog.tscn needs to function differently, because the file dialog currently filters by .exe files which isn’t suitable for MacOS, not to speak about the fact that something like the “Godot.app” file actually isn’t a file on MacOS, but a directory. That would require some more changes under the hood, I guess.
Who knows what else needs to be done to make everything work as expected. So it’s not only the export itself which is missing. (Nonetheless a very cool tool, I think, regardless of the fact I can’t actually use it!)
Before someone asks, unfortunately I am lacking some time to help out fixing that. Thus some other Apple users need to jump in. 🙂