Mac OS X Panther
| Version of the macOS operating system | |
| Screenshot of Mac OS X Panther. Notice how the Finder icon in the Dock has been changed and Internet Explorer has been replaced by Safari. | |
| Developer | Apple Computer, Inc. | 
|---|---|
| OS family | |
| Source model | Closed, with open source components | 
| General availability | October 24, 2003 | 
| Latest release | 10.3.9 / April 15, 2005 | 
| Platforms | PowerPC | 
| Kernel type | Hybrid (XNU) | 
| License | Apple Public Source License (APSL) and Apple end-user license agreement (EULA) | 
| Preceded by | Mac OS X 10.2 Jaguar | 
| Succeeded by | Mac OS X 10.4 Tiger | 
| Official website | Apple - Mac OS X at the Wayback Machine (archived January 11, 2005) | 
| Tagline | The evolution of the species. | 
| Support status | |
| Historical, unsupported as of March 4, 2007 | |
| Part of a series on | 
| macOS | 
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Mac OS X Panther (version 10.3) is the fourth major release of macOS, Apple's desktop and server operating system. It followed Mac OS X Jaguar and preceded Mac OS X Tiger. It was released on October 24, 2003, with the retail price of US$129 for a single user and US$199 for a five user, family license.
The main features of Panther included a refined Aqua theme, Exposé, Fast user switching, and a new Finder. Panther also included Safari as its default browser, as a change from Internet Explorer in Jaguar.