Aurelia has a 2007 MacBook Pro and wants to know if OS X Mavericks would work on it. Leo says it's right on the edge and it depends. It may actually come down to RAM. 2GB of RAM is a bit light. Even if it will install, it may be slower, not faster, and it would be difficult to go backwards. Apple's recommendations call for 2008 or later. Leo recommends going with Lion, but no later. It's really time to start saving up for a new Mac.