What are the Macintosh system requirements?
The HP LaserJet Professional P1100/P1560/P1600 Series Printer supports Mac OS X V10.4 (Tiger), V10.5 (Leopard), and V10.6 (Snow Leopard). The correct driver is automatically installed following the guidance provided in Section 3 from page 238.
From the official HP 123 Laserjet Printing Supplies manual, page 238
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