Apple today released the third beta of OS X 10.11 El Capitan to developers for testing purposes, just over two weeks after releasing the second El Capitan beta and a month after unveiling the new operating system at its 2015 Worldwide Developers Conference.

The update is available through the software update mechanism in the Mac App Store and through the Apple Developer Center.



OS X El Capitan largely builds on the features introduced with OS X Yosemite, focusing on improving performance and user experience. Behind-the-scenes improvements in El Capitan have made a number of apps and processes on the Mac much faster, and the introduction of Metal makes system-level graphics rendering 40 percent more efficient.

Along with a new systemwide font, El Capitan includes a revamped Mission Control feature, a new Split View feature for using two full-screen apps at once, deeper functionality for Spotlight, and several new features for Safari, including Pinned Sites for housing frequently-visited websites and a universal mute button that quiets all tabs.

OS X 10.11 El Capitan is currently only available to registered developers, but Apple plans to offer a public beta of the software in July. Following testing, El Capitan will see a final release in the fall of 2015.

What's new in OS X El Capitan beta 3:

Two-Factor Authentication - iOS 9 and OS X 10.11 El Capitan include an entirely revamped two-factor authentication system.

Photos app - As in iOS 9 beta 3, there are new albums for selfies and screenshots in the Photos app in El Capitan beta 3.