Apple on Tuesday issued an update to its 15-inch MacBook Pro with Retina display, adding faster Intel processors, as well as the new pressure-sensitive Force Touch trackpad. The new trackpad, previously available on the 13-inch MacBook Pro and 12-inch MacBook, has built-in force sensors and a Taptic Engine that delivers haptic feedback. It allows users to click anywhere with a uniform feel, and users can even customize the amount of pressure needed to register each click. Force Touch opens up a range of new gestures, including the new force click. Developers can tap into these expanded capabilities with new APIs...