I installed it in the past in the separate partition. I had to do a clean install of Mavericks and then I installed Yosemite. I did this in a partition of my SSD, so it was quite tiny, and later I decided to just delete it. In my macbook fonts suck, so I will not use it ever as my main system because of this, but I would like to have it in my HDD, in a separate partition, just to keep track of OSX evolution. I would install it if I had a hi res imac or a retina, but that is not the case unfortunately for me. Anyways, is a clean install possible now? yes or no?