I've downloaded Bitnami as the first step to creating a child theme. I have no problem logging in and accessing the local host. No problem creating a child theme folder in TwentyTwelve but as soon as I try to save a style.css in that folder, I receive an error message:
"you don't have permission to save in this location contact the administrator"
thanks! and please talk me through it as if I'm stupid b/c I'm a writer and not much of a programmer. Just learning...