7 versions of Mac OS X

Mac OS X v10.1

It had better performance and provided missing features, such as DVD playback. It was discovered that the upgrade CDs were full install CDs that could be used with Mac OS 9 systems by removing a specific file.

Mac OS X v10.2

It brought great performance enhancements, a sleeker look, and many powerful enhancements. A system-wide repository for contact information in the new Address Book, and an instant messaging client named iChat.

Mac OS X Panther

Panther included as many or more new features as Jaguar had the year before, including an updated Finder, incorporating a brushed-metal interface, Fast user switching, FileVault, Safari, improved Portable Document Format rendering and much greater Microsoft Windows interoperability.

Mac OS X Tiger

Among the new features, Tiger introduced Spotlight, Dashboard, Smart Folders, updated Mail program with Smart Mailboxes, QuickTime 7, Safari 2, Automator, VoiceOver, Core Image and Core Video. The initial release of the Apple TV used a modified version of Tiger with a different graphical interface and fewer applications and services.

Mac OS X Leopard

It concludes more than 300 new features. New features include a new look, an updated Finder, Time Machine, Spaces, Boot Camp pre-installed, full support for 64-bit applications, new features in Mail and iChat, and a number of new security features.

Mac OS X Snow Leopard

For most users, the most noticeable changes of Snow Leopard are: the disk space that the operating system frees up after a clean install compared to Mac OS X 10.5 Leopard, a more responsive Finder rewritten in Cocoa, faster Time Machine backups, more reliable and user friendly disk ejects, a more powerful version of the Preview application, as well as a faster Safari web browser.

Mac OS X Lion

It includes support for the Mac App Store, and brings much other development, such as an easily-navigable display of installed applications to the Mac. Changes made to the GUI include the Launchpad, auto-hiding scrollbars that only appear when they are being used, and Mission Control.