I want to make a folder that can only be accessible from my user account on my iMac. I know that schools and other places with shared account on an iMac have this; it is just a folder with it's name and a small, red negative sign that prevents you form opening it if it is not on your account. I'm not really looking to make a Disc Image thing unless someone wants to give me detailed instructions on it, I already made one and have no idea how to save to it, use it, or even open it.