This is driving me nuts. I love my Z3100 24" printer, but it keeps telling me that my driver needs updating. The driver version has been 5.0.2. A new driver (5.0.2b), indeed, has been out for some time. I have downloaded the appropriate files from HP's site, unpacked the .dmg file and installed the files. The splash screen on the installer says that I'm updating the driver to the "b" version. Yet, when I check to see what driver has been installed after the process has been run, it still says 5.0.2! Then, the dumb software keeps telling me that I need to update the driver! I've been using the May 14th version of the HP Designjet Installer. I just don't know what to do. This happens whether I get the driver through the Printer Utility (which never successfully installs it - I have to do it manually), or when I get the files directly from HP's Web site. Thanks in advance. BTW, I am very computer literate. I've had macs since 1986 and never encountered this kind of problem.