Why is my Mac not connecting to my printer?
To troubleshoot your connections, disconnect every cable between the printer and computer, then reconnect, making sure that the connections are tight. Each Mac model has several USB ports; if your printer still doesn’t work after reconnecting the cables, try another USB port.
How do you set two Printers as default?
How to Set Up Multiple Printer DefaultsConnect to the network at your present location. … Click Start and then “Devices and Printers.”Click any printer and then “Manage Default Printers” from the toolbar.Click “Change My Default Printer When I Change Networks.”