But trying to re-add the printer in Printers & Scanners didn’t enable printing. Next, I deleted the printer in System Preferences > Printers & Scanners. Although I can’t recall the exact path, I found its folder location buried (to find the path, hold down the command key, and click and hold in the window’s title bar) in a folder or two that was inside an HP folder residing in /Library/Printers (not /System/Library or ~/Library/Printers). I clicked on the “Reveal in Finder” button to locate the file.
Then later in the day, an HP framework file was identified by macOS as being dangerous, and something that could damage my system. And that update was a small HP driver update. Oddly, as I recall, it began earlier in the day with Software Update telling me that I had an update. I have a 16-year old HP LaserJet 4300, and I’m on macOS 10.15.7.
This happened to me on Saturday, October 24.
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