OS X Yosemite (version 10.10) is the eighth major version of Apple's computer operating system, OS X. It was announced at Apple's Worldwide Developers Conference (WWDC) 2014 on June 2, 2014, and was released to developers and beta testers on that same day. It will be released to everyone in the fall of 2014. Following the way OS X Mavericks was named, OS X Yosemite is named after Yosemite National Park in California.