I don't know where to put this so I will here I wand wondering if it was possible to install leopard or something on to a hard drive and boot it from it. I tried running the install disk I have but it gives me a kernel panic. I don't want to replace mavericks. Just a secondary is to play with. I also tried booting it in virtual box but it got stuck after saying something about macbook pro 8,1 Ant ideas? Thanks!