No...but I am using the Intel iMac Aluminum...are you using it or the white plastic? I do my bounce and bring my mix into iTunes on my aluminum. I do this to test against songs produced by the Pro'a - guya likw Mutt Lange and the Shania records or Brittney Spears early stuff, or Avenged Sevenfold...I do this because the iMac Alum speakers are just good enough to show me what my stuff would sound like to the rest of the world compared to the tunes the best producers are putting out. I mean, my mixes sounded great to me on my Sony Pro headphones and my KRK Rockit 5's....but when brought into iTunes and compared to the professional mixes my stuff sound tinnier and weaker. I am not trying to achieve parity through the Imac speakers becuse all my higher end stuff allows me to live in Illusion land. However, the speakers on the white iMac are really terrible. But back to topic, I think there could be a way to send your MBox audio signal into the iMac monitor through the sound input with a stereo DIN jack - I think.....