I placed the project specific icns file under griffon-app/resources/projectname.icns,
upon "create-mac" a file of this name is created under
but: it's the original griffon.icns - plus: griffon.icns is ALSO copied there.
The project-specific icns-file is overwritten with a griffon.icns file!
I re-installed the installer-plugin - no difference.
I tried griffon package jar - and the jar contains the correct icon!
I tried prepare- / create-izpack - contains the wrong icons (griffon.icns)