Apple has released OS X El Capitan as a free update to all Mac users.
The OS X El Capitan update should offer particularly worthwhile refinements to Mac users currently running OS X Yosemite.
Any Mac that is capable of running OS X Yosemite or OS X Mavericks is supported and can run OS X El Capitan.
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.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.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.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.