imac not able to print on HP OfficeJet Pro 8620

Turn off the printer and unplug it for ~5 minutes. Uninstall the Printer using the HP Uninstall, go into Finder and search for anything/everything HP and delete those files - everything HP related. Empty the Trash. Restart the computer. Again go into Finder and search for anything/everything HP and delete those files - everything HP related. Empty the Trash. Again restart the computer.  Plug the printer back in and turn it on.  Open System Preferences, Printers & Scanners, add a printer using the Generic PCL Laser Printer and it worked for my OfficeJet 8600 Pro.

Sorry last part to the fix is to then go to https://support.hp.com/us-en/drivers/selfservice/closure/hp-officejet-pro-8600-e-all-in-one-printer-series-n911/4322914/model/4323658?ssfFlag=true&sku= to get the latest drivers. Make sure you select the proper iOS - the site defaults to OS 10.15. Download and install the new drivers and follow the prompts. When asked if you want to use the Generic or HP drivers select HP. To scan now I use the Image Capture application.

Please do the following in this order:

• ·Uninstall all HP software, put in the Trash and empty the Trash.

• ·Please reset the printing system per Reset the Mac printing system to solve a problem

• ·Next, follow the instructions in Adding a printer