Apple on Wednesday said its big new update to OS X, El Capitan, will be available beginning Sept. 30 for free. The software was officially detailed back at WWDC in June, emphasizing under the hood performance enhancements and tweaks to make for the best OS X experience yet. It’s not a sprawling update full of major new features, but it’s still an important addition.

Some of the new features include SplitView, improved Mission Control, a more powerful Spotlight, and more. Apple’s Maps app is even getting an update with public transit info, letting you plan your next trip by train or bus. The biggest update, however, is Apple’s promise that everything will be faster and smoother thanks to the company’s new Metal graphics technology.

Back up your systems now, and start preparing yourself for the update. We actually got our hands on an early preview of the software, which you can check out below.