If you are unable to print, scan, or fax, then it means your driver is not installed. If you can print, scan, or fax, then your driver is installed and you can use your printer. Try to print, scan, or fax based on your printer functionality. Go to the HP Printer and Scanner Software for macOS Sierra website to manually install the drivers.If you get a pop up on the screen that the software is currently unavailable, click Cancel. When prompted to install the software, click Download and install to finish the installation. Tap the Add option to add your printer to the list.While selecting, be careful that you don’t select a Generic driver option from the Use menu as it results in limited printer functionality. Click the option Use or Print using menu and then select the name of your printer from the list.If the printer is removed, click the (+) symbol to Add Printer or Scanner.If your printer name is not listed, click Add Printer to Scanner and select the name of your printer. Click the name of your printer and then click the (-) sign to delete the printer. If the printer is listed, remove and re-add the printer to confirm the communication and to ensure that the right device is installed.