The update is available for download from Apple's website or via Software Update on Mac OS X. Safari 5 is a 39.1MB update.
"Safari continues to lead the pack in performance, innovation and standards support," said Philip Schiller, Apple's senior vice president of Worldwide Product Marketing. "Safari now runs on over 200 million devices worldwide and its open source WebKit engine runs on over 500 million devices."
Available for both Mac and Windows, Safari 5 includes improved developer tools and supports a number of new HTML5 technologies that allow developers to create rich, dynamic websites.
The latest version of Apple's Web browser also includes Safari Reader, which makes it easy to read single and multi-page articles on the web by presenting them in a new, scrollable view without any additional content or clutter. When Safari 5 detects an article, users can click on the Reader icon in the Smart Address Field to display the entire article for clear, uninterrupted reading with options to enlarge, print or send via email.
Safari 5 adds more than a dozen powerful HTML5 features that allow web developers to create media-rich experiences, including full screen playback and closed captions for HTML5 video. Other new HTML5 features in Safari 5 include HTML5 Geolocation, HTML5 sectioning elements, HTML5 draggable attribute, HTML5 forms validation, HTML5 Ruby, HTML5 AJAX History, EventSource and WebSocket.
The details match a support document published over the weekend that suggested the release of Safari 5 for Mac and Windows was imminent.