Updating computer operating system
It manages the computer's memory and processes, as well as all of its software and hardware.It also allows you to communicate with the computer without knowing how to speak the computer's language.Without an operating system, a computer is useless.
In order to reinstall drivers and files for the latest OS X build, you can download a Combo Update.
Software programs such as Word, Excel, Adobe Reader and Acrobat, Firefox, Chrome, Internet Explorer, and Symantec can also require updates and patches from time to time.
Phone and tablet apps release updates as well; check your app store or information within the app to see what the update will do.
Follow the instructions in Apple's How to Upgrade guide, to update your Mac to the most recent version of Mac OS.
Every computing device uses software called an Operating System (OS) to manage basic tasks such as storing and retrieving data, interfacing with other programs and hardware, and more.