Hi, I am trying to transfer songs recorded on the Yamaha P155 using a USB Storage device to a Macintosh computer. Unfortunately Yamaha mention the keyboard's documentation that to accomplish transferring songs between a computer and a P155 keyboard using a USB storage device one must install their "Musicsoft Donwload Software" which is only available for Windows PC. Has anyone been able to successfully transfer songs between the P155 and a Macintosh using a USB Storage device? I have tried formatting the USB device using the P155 Keyboard and although I have been able to transfer songs to the device these are only recognized by the keyboard, not by the computer. Any help is appreciated. Thanks.