That is an AppleTalk or EtherTalk printer, unless it has a jetDirect card in it.

Do you have a Mac running 10.5 or older on your network?

I spent a lot on HP Deskjet for Mac, for PC (Deskjet) but that was over 22 yrs ago.

And usually it does get to be forced upgrade to have driver support plus you can't compare cost performance - my $300 laser printer 25ppm does not even compare to the LaserWriter series of 20+ yrs ago with their $3000-8500 price tags.

per Google

HP DeskJet 1600CM PostScript Printing System v 8.1.1 and GX v 1.0 for Macintosh

More on "installing network printers in Mac OS X"

HP Install Your Printer in Mountain Lion

http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&dlc=en&docname=c03425022

Lexmark and others setup first with USB, then LAN or wireless

http://support.lexmark.com/index?page=content&id=HO3732

LaserJet on a campus network setup - has some nice screen shots to aide users

http://www.divms.uiowa.edu/help/macosx/mountain_lion_printers/

How to install a network printer

http://www.msl.ubc.ca/it-support/printing/install-printer-osx

Google again:

APPLE: HOW TO ADD NETWORK PRINTER:

http://www.google.com/#sclient=psy-ab&q=apple+support+add+network+printer

Mac 101: Printing (Mac OS X v10.6)

Lion and Mountain Lion:

http://support.apple.com/kb/HT4670

Wi-FI Setup http://support.apple.com/kb/ht3500

Archived older systems

http://support.apple.com/kb/HT2495

Add Windows Shared Printer

http://support.apple.com/kb/ht3049