Microsoft ultimately released a Mac OS X edition of Internet Explorer for Mac, which was included as the default browser in all Mac OS X releases from Mac OS X DP4 On January 7, 2003, at Macworld San Francisco, Steve Jobs announced that Apple had developed their own web browser, called Safari.It was based on Apple's internal fork of the KHTML rendering engine, called Web Kit.
The final stable version of Safari 2, Safari 2.0.4, was released on January 10, 2006 for Mac OS X.It was only available as part of Mac OS X Update 10.4.4.Initially only available as a separate download for Mac OS X v10.2, it was included with the Mac OS X v10.3 release on October 24, 2003 as the default browser, with Internet Explorer for Mac included only as an alternative browser.1.0.3, released on August 13, 2004 was the last version to support Mac OS X v10.2, while 1.3.2, released on January 12, 2006 was the last version to support Mac OS X v10.3.This version addresses layout and CPU usage issues, among others.
Safari 2.0.4 was the last version to be released exclusively on Mac OS X until version 6 in 2012.
The final version of Safari 3 is 3.2.3, released on May 12, 2009.
On June 2, 2008, the Web Kit development team announced Squirrel Fish, The engine is one of the new features in Safari 4, released to developers on June 11, 2008.
However, 10.3 received security updates through 2007.
In April 2005, Dave Hyatt, one of the Safari developers at Apple, documented his study by fixing specific bugs in Safari, thereby enabling it to pass the Acid2 test developed by the Web Standards Project.
On April 27, 2005, he announced that his development version of Safari now passed the test, making it the first web browser to do so.