i have been trying for the last 2 hours to try and record a minidisc from my mac which runs 10.3.9. i have been trying to use itunes which for some reason won't accept my 3 second mp3 between songs so the mini disc has tracks. i have 3 different minisdisc recorders i have been trying. a sony mz-r900, sharp ms722 and a sharp ms702 all will play a disc. on the sony i get no signal, 722 a din unlock message and the other sharp i dont get a message. my computer sees the usb connection from the md port dg1 or the dg2 ( i have tried both) but i can't get any of them to record. can someone please give me some help as to why this is happening. thanks