Here you can download the official Mac OS X 10.3 Panther ISO for free.
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.
Download Mac OS X 10.3 Panther:
Architecture: PowerPC
File-Format: ISO
Disk 1: Archive.org
Disk 2: Archive.org
Disk 3: Archive.org
