How to reset the printing system on your MacIf you're having problems printing from your Mac, this hidden tool will likely solve your problem.
We've all run into a printing problem at one time or another. Sometimes a document gets stuck in the queue and won't print, or your Mac can't find your printer on your network.
Usually one of these steps will get things running smoothly again:
Make sure the printer is properly connected either directly to the Mac or to the same network the Mac is using
Update the printer driver software
Delete and re-add the printer using the Printers & Scanners preference pane
Restart the wifi router and/or printer
But occasionally, these simple fixes are not enough. That's when you have to bring out the heavy-duty tools.
There's a hidden command in macOS that will reset the Mac's printing system. Using it will clear out your list of devices that can print, scan, or fax from the Printers & Scanners preference pane and also do a bunch of behind-the-scenes housekeeping, the details of which y...
Source:
How to reset the printing system on your Mac