Note: this is a "vintage" tip for older computers/systems.
If System Prefernces on 10.11 freezes after clicking "Add" for a Ricoh SP 3510 DN printer, try entering a queue name or upgrading the firmware on the printer (this can be done from Mac). Alternatively, wait about an hour for the add function to work!
The firmware URL is http://support.ricoh.com/bb/html/dr_ut_e/apc/model/sp35/sp35.htm?lang=en
TIPS PAGE