As I asked in reply to your post at DAZ, did any other plugins install correctly? Or shaders? By which I mean those with their own installers, not those included with DS. If not, or if you can't test, it may well be that the application path was not correctly written when DS was installed - it goes in a .ini file on Windows but I'm not sure where a Mac stores it. Reinstalling DS might help if that's the case; however, if other things did install correctly that shouldn't be the problem.