Mac OS X includes printer drivers for some popular USB inkjet printers. A printer driver update was available from Apple. However, this update is no longer available as the same or newer printer drivers are available directly from the printer manufacturer.
For additional printer drivers for Mac OS X, check with the manufacturer of your printer.
Some Printer Manufacturer's Web sites:
Canon: http://www.canon.com
Epson: http://www.epson.com
Hewlett-Packard: http://www.hp.com