With OS X El Capitan, Apple focused on two main areas of improvement: experience and performance. Experiential upgrades include advancements in search, window management, and first-party apps.

Version 10.11 of the Mac OS X operating system, named after a rock formation in Yosemite National Park. Introduced in 2015, El Capitan includes faster performance and a raft of enhancements ...

As a result, people with a basic free developer account are able to download the new macOS developer ... downgrading to an older version of the Mac OS.