That is what I'm running, although I had to uninstall BCC 4 and reinstall. That helped with my problems. Watch out for deleting FCP prefs, so far everytime I've done so I had to go back and reinstall the latest update. I was told after deleting prefs, start FCP with the Caps Lock button down...quit and start FCP without the caps lock on. I'll give that a try next time I delete prefs.