When setting up a MAC to print to a Xerox Docucenter 3375 , 

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1. I believe the answer is to find where to make the setttings in the  printer (via the control panel or web interface) and set it so that the default language is KDPL3 (PostScript 3).

2. Download and install : https://www.fujixerox.co.jp/download/apeosport/5_c7780/mac1010e/prt/

2. Go to System Preferences, Printer and add a new printer (‘+’ button).
Choose ‘IP Printing’ and LPD and enter the IP address of the printer.

It will find your printer automatically and it will choose the right driver (Eg FX Docucentre-II C4300 v3016.103 PS’ above). This will NOT work with a non-Postscript printer!

You need to Choose ‘Select Software’ then choose the ‘FX Print Driver for Mac OS X v1.3’ that you just installed.