In Pictures: OS X Mountain Lion arrives - the top ...
Auto-setup of AirPrint printers
Apple's AirPrint technology to let iOS devices print wirelessly with no configuration hasn't taken off as you might have expected -- maybe people have discovered they need to print rarely when mobile.
But AirPrint printers are slowly finding their way into homes and workplaces, given that Hewlett-Packard and others include the technology in many models. OS X Mountain Lion now sees such printers when you add a printer in the Print & Scan system preference, and it gets and installs any drivers for you as well. Basically, it's now AirPrint-aware.
In Pictures: OS X Mountain Lion arrives - the top 25 features