Let's say that my Mac came loaded with Lion and then I upgraded to Mavericks and decided to stick with that version. Then later on, my hard-drive crashed and after installing anew HDD, I was forced to use the Recovery Mode to reinstall my OS. My understanding is that boot Cmd+R would reinstall the OS that came with my Mac (e.g. OS-X Lion). If my hardware was capatible - and let's assume it was - I could also go to the App Store and install High Sierra as well. But in 2018, what if I wanted to get back to Mavericks? Is there a way to do that using Recovery Mode? My suspicion is "No" because Apple would have removed all older OS versions and I would only have access to either OS-X Lion via Recovery Mode or High Sierra via the App Store. Is that correct?