Apple CEO Tim Cook takes the stage during the Apple Worldwide Developers Conference.Apple Inc Chief Executive Tim Cook kicked off the company's annual World Wide Developers Conference (WWDC) on Monday, by announcing the latest version of its Macintosh operating system, OS X "Mavericks". The new OS can now handle multiple display and "tagging" of documents, among other new features.
[ Related: Apple unveils 'Mavericks' software for Macs, new Pro ]
Cook told the audience of developers at the Moscone Center in San Francisco that its app store now has 900,000 apps, which have been downloaded a total of 50 billion times.
Apple's hardware also got a refresh with newly redesigned MacBook Air laptops and Mac Pro desktops unveiled to the eager crowd.
Marketing chief Phil Schiller offered the audience a sneak peek at Apple's upcoming new Mac Pro - its top-of-the-line computer with a sleek cylindrical chassis that he said will feature several times the processing and memory speed and power of the previous generation.
"Can't innovate any more, my ass," Schiller said as he showed off
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