I'm seeing a lot of different information about this and would like to know exactly what model is the latest that can run OS X 10.6. I need it for certain versions of media applications that do not run on later OS X. Some caveats: The Retina 9,1 (mid 2012) dropped support for upgradable RAM and storage drives. What is the latest MBP that allows you to upgrade RAM and to a modern SSD? In addition, can anyone tell me what 10.6 Installation DVD I need to then install it?