Linux user here: I think you are going to be out-of-luck. One of the benefits of using expensive Apple is 'nothing works' unless Apple supports it and you 'pay-for-it'. Please excuse my jaundiced view.
The advice from the gmic page for trying partha or aferrero versions is well out of date. 3 years old and both people have vanished for whatever reasons.
Not a lot of luck using MacPorts see: https://discuss.pixls.us/t/gmic-qt-for-g...ma/39936/7 but might be worth a try.
Not difficult to compile in linux, I wonder why not for MacOS ? It is a great plugin, you can only hope it becomes available in the future.
Edit: Just a thought, Krita https://krita.org/ has a MacOS version and comes with its own gmic plugin (at least the linux version does) currently krita 5.2 and gmic 3.2.4
The advice from the gmic page for trying partha or aferrero versions is well out of date. 3 years old and both people have vanished for whatever reasons.
Not a lot of luck using MacPorts see: https://discuss.pixls.us/t/gmic-qt-for-g...ma/39936/7 but might be worth a try.
Not difficult to compile in linux, I wonder why not for MacOS ? It is a great plugin, you can only hope it becomes available in the future.
Edit: Just a thought, Krita https://krita.org/ has a MacOS version and comes with its own gmic plugin (at least the linux version does) currently krita 5.2 and gmic 3.2.4