Software : Apple : OS X

Apple OS X

(as of 10/9/2015)
El Capitan

Software Overview

Main Features

  • Runs on Macintosh computers, such as the iMac and MacBook Pro
  • Features the Finder desktop interface that allows you to organize your applications, files, and downloads
  • Bundled with a variety of applications, including iTunes, Safari, iPhoto
  • Used in personal, educational, and professional environments

OS X is an operating system (OS) developed by Apple and designed to run on Macintosh computers, such as the iMac and MacBook. Mac OS X was originally released in 2001 and is based on NeXTSTEP, an operating system developed by NeXT, which Apple acquired when Steve Jobs returned to Apple in 1997. Both NeXTSTEP and OS X are Unix-based and use the same Mach kernel. The OS was called "Mac OS X" until version OS X 10.8. when Apple dropped "Mac" from the name.

The operating system comes bundled with a variety of applications, such as iTunes, Safari, iMovie, iPhoto, QuickTime Player, and TextEdit, that can be used for a variety of purposes, such as listening to music, surfing the web, and viewing photos. Finder is the desktop interface for OS X and includes several standard features. OS X includes a menu bar, which is fixed at the top of the screen. The Finder also includes a Dock, which is displayed by default at the bottom of the screen, that enables you to organize all your applications, files, documents, downloads, movies, music, and pictures.

After Windows, OS X is the most widely used desktop operating system and is popular among personal, educational, and professional users.  The OS provides a variety of features that Apple consistently updates. The Yosemite version brought several changes to the OS, including a closer appearance to and more integrated features with iOS 8. Even though the OS comes with Mac computers that are often more expensive than computers running Windows, OS X is still an impressive operating system.

▶ Primary file extension

.APP – Mac OS X Application

▶ Other file extensions used by Apple OS X El Capitan

Supported File Types
.BUNDLEMac OS X Application Bundle
.COMPONENTMac OS X System Component
.FSMac OS X File System Plug-in
.KEXTMac OS X Kernel Extension
.PREFPANEMac OS X System Preference Pane
.SAVERMac OS X Screen Saver
.WDGTDashboard Widget
Additional Related File Formats
.BINGeneric Binary Executable File
.SCAPEFI Firmware File
.SUITMacintosh Font Suitcase
.SWPSwap File

Updated: October 9, 2015