Apple’s Craig Federighi said it was going to be the fastest version of OS X to date: “It’s up to 1.4x faster and we’ve seen it twice as snappy switching between apps.”

“Users can search for documents I worked on last June and it will find all the documents created in June last year on your Mac,” said Federighi.

OS X El Capitan builds on the groundbreaking features and beautiful design introduced in OS X Yosemite, refining the experience and improving performance in lots of little ways that make a big difference.

OS X El Capitan gives you even simpler, smarter ways to do the things you do most with your Mac. Like working in multiple apps at the same time, searching for information, keeping tabs on your favorite websites, checking email, taking notes and much more.

Improvements under the hood make your Mac snappier and more efficient in all kinds of everyday tasks — from opening PDFs to accessing your email. And with Metal for Mac, you get faster and more fluid graphics performance in games, high-performance apps, and many other places.