According to both Iomega and Apple, the drivers that Iomega offers are not supported nor are they needed with OS 10.4 or higher (which I have OS 10.4.9 installed), according to Apple the Zip drive should be support with Apples USB Mass Storage software, this information is available on both Apples and Iomega's support web site's. I downloaded this and attempted to install, but it said I need to in stall OS 9 support, which I then did, but "USB Mass Storage software" still will not install because it says my computer is incompatible... Don't know why, it worked before I had reformat and reinstall everything.