(You do need to be running at least OS X 10.6.8 - Snow Leopard - to upgrade to Mavericks.) And it has the same hardware requirements as any Mac that can run Mountain Lion. Note: You can install Mavericks on any Mac that's authorized with the Apple ID you're using. OS X Mavericks should be at the top of the list of software you can download and install. Open the App Store and, if Mavericks isn't in the Featured area, click on Updates.
Mavericks is available through Apple's Mac App Store (which can be found under the Apple Menu). Thousands of files are about to be swapped around your hard drive as you upgrade to Mavericks, so it makes sense to make sure everything is in tip-top condition. In fact, it wouldn't hurt to do a scan of your system using Disk Utility (it's in the Applications > Utilities folder) or with a third-party utility like Disk Warrior, just in case things aren't running as well as they should be. Before you install Mavericks, be sure to back up your Mac.
