With much help and support, 3 Macs, 2 Zip Drives, a flash drive and even a floppy, I'm sunk. Still get the "port in use" error. Got an app called Port Peep that says the port is available. I'm thinking this isn't even possible anymore. Any serial-to-midi, USB-to-midi things anyone has had success with? Or an otherwise way to write data onto the flash card?