Made the mistake of inserting an old iMovie DVD w a paper printed label which was unreadable (no alert or desktop icon) into my external Superdrive. It makes repeated noises like it’s trying to eject, but doesn’t. Tried restarting & ejecting w keyboard combos, holding down mouse at startup, & ejecting w terminal command. No luck. There’s no paper clip eject hole, so what to do now? Thanks for any thoughts.