I have bought Macbook with Lion, which I have upgraded to Yosemite. Now I want to reinstall Yosemite from stratch. Which Mac OS version will be installed if I'll follow this instructions (Command (⌘) and R keys).
Will it install Lion (which was installed on my Mac Air when I have bought it) or will be downloaded last version - Yosemite?
How can I install Yosemite from stratch?