I don't know why you would think that. I help many people and answer as I can as do all the experts here.
You are the only person that you know that uses a Mac?
This is one way to resolve this but be careful.
To do this, follow these steps EXACTLY:
New admin account from Boot:
Do a restart and hold COMMAND and S keys down as soon as you hear the chime.
When you get text prompt enter in these terminal commands to create a brand new admin account (hitting return after each line):
mount -uw / Note the spaces after mount and the w. very important
rm /var/db/.AppleSetupDone note the space after the rm
shutdown -h now note the space after the n in shutdown and after the h
When it restarts, you will have a new admin account to boot into.
Now go to the Apple Menu and choose System Preferences. Click on Accounts.
Click on his account and try to change the password. If you cannot, then deleting and saving is the only option to get access to those files.
Delete the User and it will ask you what to do with it. Choose save as archive/image.
The OS will remove that user and save it on your Desktop or in the Macintosh HD.
Double-click to open it. The files will be saved in various locations in that mounted image.
Like I said, with a disk or another Mac plus a firewire cable it gets much easier.
This is no scam but patience is required.