Use grayscale printing (Mac OS 9.x)
Instructions for using grayscale printing in Mac OS 9.x. Grayscale Printing allows you to convert color documents for printing in black and white without changing the original colors.
Note: Grayscale printing does not prevent the use of all inks. Shades of gray are created by using all color inks to create a composite shading.

- Select 'Print...' or 'Print Desktop' from the File menu.

- Check the Grayscale Printing checkbox.

- Click 'Print'. The color document will be printed in monochrome.