Updated: Watch the full event below.
Apple ditched lions, tigers, pumas, ocelots and other big kitties with last year's OS X update: Mavericks. Contrary to popular legend, it wasn't named after the Tom Cruise character from Top Gun. Mavericks is actually the name of a popular surfing destination in northern California known for big waves. Now, Apple has followed it up with another California landmark: Yosemite.
That's the name of OS X 10.10, the latest major update to Apple's Mac operating system. And it is a MAJOR update.
Yosemite features the biggest redesign to the look and feel of the interface in a long, long time. Here's a rundown of what's new: