Apple ColorLaserWriter 12/600PS - Manual (Page 355)

IMPORTANT If you are using QuickDraw GX on your computer, you cannot
remove the desktop printer software as described in this appendix.
The printing software you installed on your Macintosh requires at least one
printer icon on your desktop and uses from 300 to 500K of your computer’s
random-access memory (RAM). If you use programs that take up large
amounts of memory, and available RAM is low, you can remove the desktop
printer software. When you remove the software, your computer uses the
original PrintMonitor supplied with your system software.
To remove the desktop printer software, follow the instructions below.
1 Quit any programs you are running.
2 While holding down the Shift key, choose Restart from the Special menu.
Hold the Shift key down until you see the “Extensions off” message on your
screen or until your normal desktop appears.
When the Macintosh desktop appears, an X appears through your desktop
printer icons.
3 Drag the desktop printer icons into the Trash.
4 Open the System Folder and find the PrintMonitor Documents folder.
5 Open the PrintMonitor Documents folder and drag to the Trash any files you find.
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Appendix H Removing the Macintosh Desktop
Printing Software