SAN FRANCISCO (AP) - Apple is switching from its decade-long practice of naming its Mac operating system updates after big cats. It is now referencing the geography of its home state. Apple software head Craig Federighi says the next version of Mac OS X will be called "Mavericks," after an undersea rock formation that produces big waves near Half Moon Bay, Calif. The new operating system will extend battery life and shorten boot-up times, Federighi told the audience at the Worldwide Developers Conference in San Francisco on Monday. The system improves support for multiple displays and imports the "tab" concept from Web browsers to the Finder file-organizer. Apple is also expected to reveal a digital radio service and changes to the software behind iPhones and iPads at the conference.