Hello! I am planning on upgrading my hard drive to a solid state and from there starting over with Mavericks (Instead of using the startup disk that came with the laptop--I currently have snow leopard, macbook pro early 2011. I need to upgrade so that I can use newer programs like the adobe suite). I can install the hard drive myself, but how would I go about starting over, with Mavericks? I know I can probably find it online even though it's not on the app store anymore since Yosemite came out, but once I do, should I download it to a CD or something like that?