Halion sonic 2 not working in standalone mode under osx 10.1

hello, Halion sonic 2 is not working in my set under os 10.10.4.
OK as plug-in, but not in standalone mode.
could someone tell me more on what to do ?

I just tried this and it took about 5 minutes to load and really only loaded as soon as I launched Activity Monitor. This is on Mac OS 10.10.5. It was installed using the Installation tool from Steinberg.