The one that comes with Toast works great. If you can find a copy, install it on your machine and presto! Your drive will work just fine. I've got one of these Yamaha drives, too, and it'll only work properly either under OS X or with Toast installed on 8.5-9.2. Other CD authoring programs may work, and you may be able to find some non-Apple CD drivers, but Yamaha never released any drivers for Classic (at least not for their SCSI drives), according to the manual included with the drive.