Mac OS 10.4 Tiger was released on April 29, 2005, 18 months after its predecessor, Mac OS X Panther. Just six weeks after its release, Apple had sold 2 million copies of Tiger, representing 16% of all Mac users. By June of 2007, over 65% of all Mac users were running Mac OS X Tiger, making it the most successful OS X release.
Tiger added several new and noteworthy features:
- Spotlight. A system wide desktop search.
- Dashboard. An application for hosting mini applications, known as widgets.
- Support for 64-bit processing.
- Automator. An application for creating and running repetitive tasks.
A full list of improvements, features, and applications can be found on the Mac OS X Tiger Wikipedia page.