It included four Beta releases that both Public Beta testers and Apple developers enrolled in the Apple Beta Software Program could test.
Mac OS X 10.11.1 El Capitan had been in development before Apple released the final build of the OS X 10.11 El Capitan computer operating system to users worldwide on September 30, 2015. After announcing the release of the iOS 9.1 software update for iPhone, iPad, and iPod touch devices, Apple began rolling out the first point release of the Mac OS X 10.11 El Capitan computer operating system.