Cannot help with the Sony problem, but the Iomega issue could be because of an old version of Toast. I have version 5.0 Titanium and it works fine with every burner that I have thrown at it: Yamaha, Sony, Iomega, Ricoh, Hitachi, Teac, Apple, etc., even one that had an IBM label on it. I am using these machines: PowerMac 7300/200, 4Gb HD, 192Mb RAM, and G3DT/400, 40Gb HD, 768Mb RAM (Both have OS 9.2), and PowerBook G3 Lombard 400, 10Gb HD, 192Mb RAM, OS-X.2.6.