I have a bunch of zip disks that i do recall password protecting. I still have the drive, which works fine, but of course i have a much new operating system for my mac. Where can I find and download the software that is compatible with os 10.10.1?
If not, you may be out of luck. The Apple forums seem to indicate that iomega ZIP drive support may have been lost with OS X 10.5 (i.e. they worked on 10.4 systems but stopped working when people upgraded to 10.5). Since that was back in 2008, you may be out of luck.