HP Color LaserJet 2550 Printer series - Manual (Page 26)

For Mac OS 9.1: The PPDs are located in
Macintosh HD\System Folder\Extensions
\Printer Descriptions
.
For Mac OS X: The PPDs are located in
Macintosh HD\Library\Printers\PPDs
\Contents\Resources\<lang>.lproj
. The PDEs are located in
Macintosh HD
\Library\Printers\PPD Plugins\HP*
.
The phrase <lang> represents the language of the printer software that you selected.
16 Chapter 1 Printer basics ENWW