I happened to glance at this question when it was at the top of the page and felt I might be able to clarify a little bit. It wasn't entirely clear if the user who originally asked the question had an answer that was clear. For the benefit of any others who might have this issue as well, I wanted to see if further input might help. Question: Does the Late 2007 MacBook support the latest version of OS X (Mavericks)? Further, if not, what is the latest version that it does support and how can I go about attaining it? Simple Answer: No. Unfortunately, your system will not support OS X Mavericks. The most recent version of OS X that you can install is Lion. Detailed Answer: From your question, I gathered that you already have the Mac App Store. If that is correct, you can purchase OS X Lion by calling 1-800-MY-APPLE for $19.99. You will get a content code that you redeem in the Mac App Store that will allow you to download and install the upgrade. Advice: I kept my 2006 MacBook Pro for 6 years before...