OS X 10.11.0

OS X 10.11.0 (build 15A284) is the first public release of OS X 10.11 (El Capitan) on September 30, 2015 by Apple Inc.

Development history
The first developer beta of OS X 10.11.0 (build 15A178w) was seeded on June 8 during the 2015 Worldwide Developers Conference.