Hello. First post. So I'm trying to reformat my girlfriend's Macbook Pro (2010 - 7,1) but she doesn't have the install disc. I have the install disc for mine (2011 - 8,1) but I've read that Macbooks (maybe) have an issue reading install discs from different iterations, even if we are both on Snow Leopard. I'm planning on reformatting it this weekend before she leaves for school, so I want to make sure it will work. So will I be able to use the install disc that came with 8,1 on her 7,1? And if I can't, what are my options? I prefer information from experience rather than speculation, please. Thanks!