Well, Snow Leopard had is problems as well: "Data losses in Snow Leopard bug" http://news.bbc.co.uk/2/hi/8304229.stm http://news.bbc.co.uk/2/hi/8304229.stm I'm

Well, Snow Leopard had is problems as well: "Data losses in Snow Leopard bug" http://news.bbc.co.uk/2/hi/8304229.stm http://news.bbc.co.uk/2/hi/8304229.stm I'm going in the other direction. Used to always wait one or two versions before upgrading and always doing a clean install. I installed bot Mavericks and Yosemite over the older versions early on without any problems.