I recently purchased a late 2008 MacBook on eBay. The MacBook was very inexpensive because it has some dents and dings on the corners. Is there a cover or case that I can get that might mask them? But, that's not the reason for this post. I am somewhat of a newbie where Macs are concerned. The MacBook works fine but I needed to download a program for work from the Internet. The program downloaded but won't install because the person who owned the MacBook previously, set the system to only install apps from the AppStore. I can't change the password because I don't have the current password. Is there a way to reset the MacBook as if it is new, without having OS X discs? The MacBook is on OS X 10.8. Thanks for any help a head of time.