Apple's Mountain Lion OS X Update Sells Three Million in Four Days

Apple AAPL has achieved "better than expected" sales from Mountain Lion, the latest update to the company's flagship operating system. According to The Wall Street Journal, this is Apple's most successful OS release yet. "Those are good numbers from an operating system," Rob Enderle, an analyst with Enderle Group, told The Wall Street Journal. "Software has high margins, so it contributes significantly to the bottom line." Retailing for $19.99, OS X Mountain Lion brings iMessage to the Mac platform, along with a host of other features. One of the most heavily promoted features is the so-called "Power Nap," which allows recent MacBook Airs (mid-2011 models and beyond) to update mail, contacts, reminders and other documents while the computer is sleeping. Last year, Apple was estimated to have sold 650,000 digital copies (downloads) of OS X Lion on the first day of its release. The company plans to release an update to its mobile operating system, iOS, later this year. Follow me @LouisBedigianBZ