I don't know anything about the Mac. But you always want to use the latest version of the DNG converter. Be sure to set your compatibility options within the DNG converter to match your version of Camera Raw. In your case that would mean choosing the option that will ensure that your DNG files will be compatible with Camera Raw 4.6.
Thanks, Jim. I noted the preferences, changed the setting from v 7.2 to 4.6. As long as I've used DNG, can't remember ever noticing preference settings. A good lesson, again...before crying for help, look over the entire screen - look under every button. I appreciate your help!