Get this printer driver from Hewlett-Packard.
Download the driver needed to run the Epson Stylus Color 600 printer on your iMac.
printer driver
Driver for the USB twin serial adapter.
For Canon printers.
Get this HP Design Jet 1050C and 1055CM printer drivers for Mac OS 9.
printer driver
For the label printer models.
Printing and scanning software for Lexmark printers.
drivers for all their printers
Drivers for the all-in-one series.
For LabelWriter 300, 400, 450 series.