Mac OS X Panther in the context of "Software versioning"

Safari is a web browser developed by Apple. It is built into several of Apple's operating systems, including macOS, iOS, iPadOS, and visionOS, and uses Apple's open-source browser engine WebKit, which was derived from KHTML.

Safari was introduced in an update to Mac OS X Jaguar in January 2003, and made the default web browser with the release of Mac OS X Panther that same year. It has been included with the iPhone since the first-generation iPhone in 2007. At that time, Safari was the fastest browser on the Mac. Between 2007 and 2012, Apple maintained a Windows version, but abandoned it due to low market share. In 2010, Safari 5 introduced a reader mode, extensions, and developer tools. Safari 11, released in 2017, added Intelligent Tracking Prevention, which uses artificial intelligence to block web tracking. Safari 13 added support for Apple Pay, and authentication with FIDO2 security keys. Its user interface was redesigned in Safari 15, Safari 18, and Safari 26.

Mac OS X Jaguar (version 10.2) is the third major release of macOS, Apple's desktop and server operating system. It superseded Mac OS X 10.1 and preceded Mac OS X Panther. The operating system was released on August 23, 2002. It was available both for single-computer installations and in a "family pack" that allowed five installations on separate computers in one household. Jaguar was the first Mac OS X release to publicly use its code name in marketing and advertisements.