How to remove a password on a mac...?

Ages ago my boyfriend put a password on his Mac to stop his flatmate going on it, unfortunately that didn't work because it's different to Windows and it doesn't stop you using it. But it does stop him from updating his iTunes and things, and he can't remember his password at all. If he took it to... show more Ages ago my boyfriend put a password on his Mac to stop his flatmate going on it, unfortunately that didn't work because it's different to Windows and it doesn't stop you using it. But it does stop him from updating his iTunes and things, and he can't remember his password at all. If he took it to the Apple shop, do you think they'd be able to get rid of it, providing he can prove it's his (which I'm sure he can)?
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