We heard some rumblings ahead of the weekend from third-party sources, and like clockwork, Apple has kicked the week off with its weekend box office returns. According to Cupertino’s numbers, the latest version of OS X hit three million downloads in four days, making for “the most successful OS X release in Apple’s history.” Price has surely played a role in Mountain Lion’s speedy success, running $20 for 200-plus features, according to Apple’s numbers. That list includes big additions like Notification Center and AirPlay Mirroring and a selection of smaller tweaks to the decade-old operating system. Read the full story at Engadget.