If you're running a Mac with Mountain Lion on it, you shouldn't have any trouble running Apple's latest operating system.
All Macs that are currently capable of running Mountain Lion will be able to run OS X Mavericks, people who claim to have knowledge of the software told AppleInsider in a story published Tuesday. This means that iMacs from mid-2007 and later, MacBooks and MacBook Airs dating back to 2008, and MacBook Pros from 2007 will work just fine.
It's important to note, however, that the information AppleInsider reported on is only for the developer preview of Mavericks. It's possible that things could change when the final build is announced. Still, if history is to be our guide, the Macs that work on the developer previews are typically supported in the final builds.
Apple announced Mavericks on Monday at its Worldwide Developers Conference. The operating system comes with several enhancements, including iBooks and Maps support, and enhanced handling of notifications.