I work with Mac OS (Snow Leopard) and my Mac don't

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.