Well I have a 15 inch Macbook Pro (new version), and the power adapter just stopped working. It's not the chord itself, it's just the square power adapter. I can unplug the chord from my power adapter, and plug it into a friends power adapter, and it works fine. They have a 13 inch macbook pro. I didn't know the 13 inch macbook pro's charger would work on the 15 but it does. Anyways, I've been looking for a CHEAP power adapter somewhere and am wondering if some other people could help me out with finding the cheapest one. I'm looking at this one - http://www.amazon.com/MagSafe-Power-...3109547&sr=8-1 Would this one work? I think it might be for the older macbook pro's.