Visit HP Customer Support - Software and Driver Downloads. The Let's Identify Your Product To Get Started page will be displayed. Choose your printer 123 hp com / setup 6978 mac, enter the model number of your printer, and select submit. The results page shows the software for your printer device with the default operating system. You can change the operating system if necessary and choose to change. Choose Download to get the complete software package under Driver. Get other driver options from the basic drivers.