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
My latest blog post: Sheeple: Are they succumbing to fake news, misinformation, and propaganda. (posted 2025-09-24). My latest podcast: OJB's Podcast 2029-09-09 Kiwi Values.