Most problems with a MAC related to the printer can be solved by restoring the printing system. This is a kind of hidden function that does not appear by itself and must be viewed with the help of a special key combination.
However, it does not work if there are other problems with the printer, for example, if the printer is off or the printer is not connected to your wireless router. whether it is a wireless printer or if for some reason there is no connection to the printer.
The first step is to check if the printer is properly connected to the computer or if it is a wireless printer, make sure it is connected to your wireless router.
Troubleshoot your mac printer problems
1. Click the Apple icon from the top left corner and select System Preferences and select Print and Scan.
2. Hold the CTRL key on your keyboard and click on a blank area under Printers to get the Restore Printing System option.
3. Click Reset Printing System. Then click on the + icon to add the printer again. If the printer is now added and shows as idle, it is set correctly. If it is not, there is a problem with the connection as above.
You should make sure it is connected before doing so again. it will never appear here unless the printer is properly connected, which is why you had the problem with your printer in the first place.