A year after launching Mac OS X Lion, Apple is planning to offer up Mountain Lion, the latest version of its operating system. Due this summer, it's not expected to be a major upgrade. Yet, there's a good chance that Apple's OS X Mountain Lion will come with enough improvements to make current Mac OS X users want to upgrade to the new offering. Chances are, you're still heavily invested in Windows in the workplace, but the number of Macs in use is creeping upward in the enterprise. With this in mind, here's what you need to know about Apple's next big operating system launch, Mac OS X Mountain Lion. The platform won't be a groundbreaking release, but it offers significant new features including enhanced Gatekeeper security and the iMessage platform, that make it worthy of evaluating as you decide whether to increase the number of Macs into your office or upgrade those you already have in place.