Hi there Listers, T: Thanks for the tip. I've also tried that but with no success. My 250Mb Zip is (now) connected through (an adapter) FireWire cable. I've uninstalled/installed the latest version of Iomegaware for Mac OS X and it is working... but not for read/write protected Zip disks and neither for the 'Ipmega Active Delivery' preference pane supplied by the full installer. Have you checked it also!? Thanks in advance, LM >>> tmandesign at mac.com - 2004/02/13 15:02 PM >>> > I have found the solution. Download the most recent Iomegaware software and choose "uninstall" first. Once all the Iomega software is removed, choose "Install." Worked perfectly for me. And I am running my USB zip off a hub (also not supposed to work). Hope this helps others. My laptop was running Panther also, so I knew it had to work; but because it wouldn't work on both my Cubes I suspected hardware. Bad move. T.