OS X Mavericks Tidbits: System Requirements, Redesigned Activity Monitor, App Battery Monitoring, and More: At yesterday's Worldwide Developers Conference, Apple unveiled its next generation operating system, OS X Mavericks. While Mavericks incorporates a number of significant changes like a redesigned Finder, a Safari overhaul, and new Compressed Memory settings, there are also a number of other, smaller changes that MacRumors forum readers and other sources have unearthed.