I’ve surrendered on trying to get gmic functioning within GIMP. I’ll consider it a small win getting hash to provide me with a standalone version. McGimp is functioning but a bit too slow.
What error messages are you getting?
dylib files were bad, wouldn’t open. Certain env files weren’t available and constant messages that compile wouldn’t continue without all the proper builds (too many to list and my mind is frazzled). Fink, no go, Homebrew, no go, cmake, no go. Macports? The winner.