I just ordered late 2013 Mac Pro for my studio, I know it will come with the pre-installed OS X Yosemite. All of my applications are running flawlessly on Mavericks and I don't wish to upgrade until those software vendors issue the official support for Yosemite. I had just missed out downloading Mavericks from the App Store. Is there anywhere to download Mavericks again? ps. Once I get my nMP, I'd like to do a fresh install of Mavericks. ********* Updated: I just found out that I can download Mavericks under my purchase history in App Store.