The MacBook Pro should work if it is Intel based.
Because of Apple requirements, you will want the latest Xcode (I don't even know if you can get older versions).
I haven't updated my guide for Xcode 5 and Apple has changed the interface a lot. I haven't had time to update the instructions.
One of the things I have been careful of with Xcode 5 is to NOT let it update the Facebook SDK. I don't know if the updated Facebook SDK will be properly compatible with the one AppGameKit is set up to work with.
The area that has changed the most in the interface is how it deals with the project settings. Especially the images. Xcode 4 actually displayed the icons and launch images. It took me a while to figure that out. I don't know what 'Use Asset Catalog' next to 'Source' means, but I have left it alone. You select icons/images for each size by clicking on the folder image in the line and you view them by clicking on the thing that sort of looks like an eye.
If you have difficulties, post them here and I'll see if I can help.
Cheers,
Ancient Lady
AGK Community Tester and AppGameKit Master
