Hi, My post is a bit similar to the post of the man who wrote a post below. The difference is, that opposed to him, I am in fact using Garage Band to create a podcast. I am also using an external mic. And even though the external mic gets recognized by my ibook G4, it is for some reason not allowed to record. (Yes, my ibook recognizes it, however, the ibook won't pick up any minor sound with the external microphone. A person at a small recording studio here in my city made me realize this, as I thought the problem was other). http://forums.macrumors.com/showthread.php?t=669902 In advance, thank you very much and kind regards, igmolinav. P.S. By the way, I had already tried two options and neither one worked out. For option number one, I used as preamp a product called iMic, in addition to the external microphone and the ibook G4. For option number two, I used the same products mentioned in option number one, plus an additional pre amp. The "success" was the same as before: recognition by the ibook G4, with the problem that one can not record into the ibook !!!!