Today ScummVM announced that Glk support is going into “official testing mode.” https://www.scummvm.org/news/20200622
But I, too, don’t see how to test it. I downloaded today’s Jun 22 build from https://buildbot.scummvm.org/builds.html and tried to “add game,” but it didn’t allow me to add any files with extension .z3, .z5, .zblorb or .gblorb, even if I put them in a folder by themselves.
@dreammaster is there a trick to getting this to work? I’m on macOS 10.15.5, if that matters.
EDIT: I also filed this on the ScummVM bug tracker. https://bugs.scummvm.org/ticket/11514
EDIT 2: Turns out it just doesn’t work on x64 macOS builds at all today!
EDIT 3: It’s fixed now.