El Capitan has upgrades affecting window management, includes Spotlight search and has better performance said Apple.
Apple has changed Mission Control for organising files on Macs and will arrange all the windows in a single layer.
Spotlight can now be used to check share prices, weather, schedules and improved search capabilities.
Apple said that built in apps in El Capitan include pinned sites, and a mute button to switch off those annoying ads that often appear in the middle of otherwise useful content.
The company claims system performance – particularly graphics – has been improved and its Metal technology can speed system level rendering by up to 50 percent.
The upgrade supports Macs introduced in 2009 and later and some machines introduced in 2007 and 2008.