Olivetti PGL 12en Reference Manual page 129

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Appendix
Your printer supports Macintosh system with a built-in USB interface
or 10/100Base-TX network interface card (option for PGL 12en).
When you print a file from Macintosh, you can use the PCL driver to
support your printer's major printing features. You can also use
PostScript driver by installing the PPD file.
Topics included in this appendix are:
N Macintosh Installation
N Using PCL Driver
N Using PS Driver