Safari 7 for OS X Mavericks and Safari 6.1 (for Lion and Mountain Lion) were released along with OS X Mavericks in an Apple special event on October 22, 2013.
Safari is a web browser developed by Apple Inc. and included with the OS X and iOS operating systems. First released as a public beta on January 7, 2003 on the company's OS X operating system, it became Apple's default browser beginning with Mac OS X v10.3 "Panther". Safari is also a native browser for iOS.
Announced at Apple's Worldwide Developer Conference (WWDC) on June 10, 2013, the Safari 7/6.1 developer preview brought improvements in JavaScript performance and memory usage, as well as a new look for Top Sites and the Sidebar, and a new Shared Links feature. Additionally, a new Power Saver feature pauses Plugins which are not in use. Safari 7 for OS X Mavericks and Safari 6.1 (for Lion and Mountain Lion) were released along with OS X Mavericks in an Apple special event on October 22, 2013.
Safari 7 uses WebKit2 and runs in 64-bit mode.