Mac OS X 10.4: Included printer drivers and PostScript PPD files:
The Driver Version column contains the PPD file version for PostScript printers or printers using CUPS drivers.
# Drivers that are denoted on the list as a Modern Driver are PPD files or drivers designed for CUPS (printing architecture available in Mac OS X 10.2 and later).
# Drivers that are not denoted as Modern Drivers cannot be selected when adding an IP printer or Windows shared printer.
# The drivers that list 'ESP' as the manufacturer are sample drivers included with CUPS.
# Some HP printer drivers support a series of printer models. To determine if a specific printer model is part of a series, see this website.
Saturday, October 28, 2006
From Apple's kb, a full list of supported printers in OS X 10.4 plus links to CUPS sources for more printers: