Hi Ali, two important questions: 1. does your CME appear in the audio/midi configuration of OSX? (programs>utilities) If not: you did not install the CME driver or did install it the wrong way. 2. do you use the cable supplied with the CME? This one is rather short, so I another one. I had the same problems like you until I discovered that the plug to insert in your CME differs from the USB cables commonly used in Europe. USB stands for Universal Serial Bus, but forget about the universal.... About the different USB-plug: I'm quite willing to prove it to all non-believers with a pic of the CME plug and pics from my other USB plugs. Just send me an e-mail.