Thanks for the email. If we resolve your problem here then it may help others. Now that you have tried your speakers with your iPod and found them good. Lets look at your MacBook. First go under the Apple (upper left hand corner) to System Preferences - Hardware - Sound - Output and check to see if you have selected "line out". Now check the lower part of this box and make sure the mute is not checked and move the volume bar to test the output. You may find your problem has been resolved.