Stuck "waiting for printer to become available"
After initially looking like it's going to print, the printer dialog displays "waiting for printer to become available" and just sits there (even though the printer - an HP C3800 Series inkjet - is ready).
Here's what I've tried:
Using the HP Utility software on the same computer I am able to successfully print a test page, which rules out a problem with the printer and its connection to the computer.
Printing worked normally before upgrading to Sierra. I have tried reseting the printing system and re-adding the printer (which Sierra recognizes just fine). I have also tried running Disk Utility in case permissions were a problem.
I'm stumped at this point. Help very much appreciated.
iMac, macOS Sierra (10.12)