How do I download and install the software for the HP Color LaserJet Pro M255 M256?

You can download the software from 123.hp.com/laserjet (Windows) or 123.hp.com (OS X) by clicking Download and following the onscreen instructions. Alternatively, you can go to www.hp.com/support/ljM255, select Software and Drivers, and download the software for your printer model and operating system. When prompted during installation, select the appropriate option for your connection type. (Page 8)