So I signed up for the public beta test of Yosemite and got the email about a week ago saying I could download it. I'm just curious how people are using it? I wanna try it but I don't want to mess anything up. I back up my stuff to an external drive so my stuff is safe. I clone my drive so I could boot from my external if I need to. I had to on my old Mac years ago cause my internal drive died. I have a spare external drive. Could I load Yosemite onto that? If so how would I get the rest of my stuff onto it as well?? Any help would be appreciated. Thanks.