Apple has released OS X El Capitan as a free update to all Mac users.
The new version of system software is officially versioned as OS X 10.11, and the final build number is 15A284.
If you haven’t done so already, it may be a good time to prepare your Mac for OS X El Capitan installation, but at the very least be sure to back up the Mac before installing any system software update.
All Mac users who wish to download OS X El Capitan must do so from the Mac App Store, where it is available as a free download from Apple: The El Capitan installer is about 6GB in size.
The installer will automatically launch itself when the download completes, and the process of updating OS X to El Capitan is a matter of following onscreen instructions.
Be sure to start and complete backup your Mac before installing OS X El Capitan, if you haven’t setup Time Machine yet, now would be a good time to do so.
Using a bootable installer is the best way to perform a clean install of OS X El Capitan.
Note that OS X 10.11.1 is currently available as a beta release as well for users who are participating in either the Mac developer program or public beta program.Users can start the download now from the App Store using the direct link below.OS X El Capitan brings performance updates and improvements to the Mac operating system, a including a new system font, split screen view, adjustments to the Mission Control window manager, improvements to Spotlight search, and various enhancements to bundled Mac apps including Mail, Safari, Notes, Maps, Photos, and Safari.There is no known timeline for OS X 10.11.1 being released to the general public. Let us know if you run into any hiccups with the update, or even if things go smoothly in the comments.Users who wish to create a bootable USB flash drive installer of OS X El Capitan should do so before installing the release, as the installer app will remove itself upon successful completion of the software update.Instructions on creating a bootable USB install drive for OS X El Capitan final are here.