This is according to the banner (pictured above) which shows off scenery that looks like it came from the Yosemite national park in California. This seems to be in line with Apple’s recent naming scheme, starting with OS X 10.9 Mavericks, which is also named after a location in California.
Apple has trademarked several other names in the past, most of which are based around the state of California, such as Mojave and Redwood, just to name a few. Yosemite was one of the names Apple had trademarked for use with OS X, and given the banner pictured above, we guess Apple has decided to go with Yosemite after all.
It is unclear as what sort of features we might be able to expect from OS X 10.10, but many are expecting the OS to undergo a major redesign. This is according to a rumor earlier this year that hinted that a OS X 10.10 could get a flatter look, much like how iOS 7 got a flat look as well. In any case we guess we’ll find out more next week, so check back with us then for the details!