Remove a printer on Mac Catalina
If you no longer use a printer,
you can delete it from your list of available printers.
On your Mac,
choose Apple menu } System Preferences, then click Printers & Scanners.
Select the printer in the list, then “— “click the Remove button .
If you delete the printer that’s set as your default printer, macOS selects another printer as your default. To set a different printer as your default, choose it from the popup menu in Printers and Scanners preferences.