I just bought a new non retina mbp from amazon at a very good sal price. I gather apple (and its sellers) are blowing them out now. In any case, it won't arrive until Tuesday and the amazon listing didn't say which version of OS X was on it. Would it be the latest, yosemite, or mavericks. If the latter is it easy to update to Yosemite. I plan soon after getting it to put in an sad and 8 gb of ram.