iMore

Any Apple geniuses out there can give me simple instructions? I just purchased a mid 2012 macbook pro i7 and want to basically make it like it was new again. As far as I know there are no passwords. There is another user listed that I can't access and would like to remove them but there is a password for that but not for iCloud or iTunes. Thanks in advance. By the way never owned a macbook before only iPhones.