Have been using the Z600 printer for a long time. Just got a new Imac with Snow Leopard. Neither the computer nor the printer want to talk to each other. Anything I can do?

Unfortunately Snow Leopard requires a intel processor to work so the G5 imac will not be able to run the system.

You're not going to be happy with this answer:

Nikon has formally sworn off doing ANY future software updates for their scanners. They stopped at 10.4 (pre-Leopard)

See
- http://support.nikonusa.com/app/answers/detail/a_id/16811
and
- http://support.nikonusa.com/app/answers/detail/a_id/14421

Yes, there are a LOT of people VERY unhappy with this answer, but we're all kind of stuck with it.

Did you install the software from the CD or did you download the driver? Are you using Snow Leopard?

If you have Snow Leopard and used the CD, you don't have the most recent drivers. Here is the link to the MP640 drivers. Remove the drivers currently on your imac and download and install from here, including the scanner driver and the MP Navigator (listed under Software).

I had the same problem when installing my Epson R300 onto my new iMac (Snow Leopard). The first install used the newest online driver from Epson. The printer symptoms were exactly like yours. Then I installed the Apple driver updates. It was seamless and now the printer settings can be accessed. Perhaps if you uninstalled (read about that on the Epson site first) and then downloaded the new factory driver, followed by the Apple update which will further update files, you might have some luck. Just a guess on my part. Best wishes.

check the connection of the printer to computer and download the imac version on hp.com

Snow Leopard has a bunch of drivers built in to control various printers.  If it doesn't recognize the printer, then you will have to go on Agfa's web site to see if they have a printer driver compatible with Snow Leopard.  Keep in mind that Snow Leopard is a new OS and that printer manufacturers will take some time to update their programs and drivers to run on it.  If you don't find a driver then, you got to use a different printer or downgrade your OS to one that will run the printer.

You can find useful information on site? http://www.epson.com/cgi-bin/Store/support/SupportSnowLeopard.jsp Mac OS X Snow Leopard Support Contact Support Welcome to Mac OS X Snow Leopard v10.6 support for Epson products. Here you can find out how to get drivers and other Epson software for your Epson product that work with Mac OS X Snow Leopard v10.6.
Check your Epson product CD to see if it already contains Macintosh OS X 10.6 drivers. If the CD indicates support for Macintosh OS X 10.6, follow the instructions that came with your Epson product to install your drivers and other software.
If your Epson CD does not indicate support for OS X 10.6, DO NOT INSERT YOUR EPSON PRODUCT SOFTWARE CD IN YOUR SNOW LEOPARD COMPUTER. Follow the step-by-step instructions below to obtain the latest software and utilities for your Epson product as they may be needed for this new operating system.
Good Luck.

This link should be the drivers for you computer.

http://support.lexmark.com/index?page=downloadFile&actp=CONTENT&productCode=LEXMARK_Z604&id=DR7903&segment=DOWNLOAD&userlocale=EN_US&locale=en

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c01844302
Try this link for OS 10.6 Snow Leopard drivers.