OS X El Capitan

OS X El Capitan (10.11) is the twelfth major release of the Mac OS X operating system released in 2015 by .

Features

 * New window management features were introduced.
 * Enhanced multi-touch gestures for Mail, Messages, etc.
 * Notes app received a complete overhaul.
 * Major improvements to Safari.
 * System Integrity Protection (SIP) is a new security mechanism.