Apple has announced that Mountain Lion has been downloaded more than three million times in the four days since its release, making it “the most successful OS X release in Apple’s history.”

The new operating system became available for download from the Mac App Store for £13.99 on 25 July, and data from online advertising network Chitika revealed that Mountain Lion accounted for 3.2 per cent of all versions of Apple’s operating system by Friday, just two days after its release.

“Just a year after the incredibly successful introduction of Lion, customers have downloaded Mountain Lion over three million times in just four days, making it our most successful release ever,” said Philip Schiller, Apple’s senior vice president of Worldwide Marketing in a statement in the company’s press release today.

Mountain Lion introduces more than 200 new features to the Mac, many of them designed to closely integrate Mac OS X with Apple’s iOS operating system. These new features include Notification Centre, Reminders, Notes, VIP Inbox, Gatekeeper, and Game Centre.