Oh, No! Lost Password

[Laisha]

I cannot believe I did this, but indeed I did!

I sold my iMac on eBay. Got almost enough to repay my savings for the cost of my new MacMini.

BUT...

When I wiped the iMac, I wrote down the new and generic password. Then, apparently instead of sending it with the computer, I misplaced it.

The buyer just contacted me to tell me he needs the password.

Help! There must be a way to get around it, right?

 

[pmau]

Other than reinstalling OSX ?
(Probably from USB)

 

[z31fanatic]

http://coolestguidesontheplanet.com/reset-forgotten-admin-password-mac-osx/

Basically he has to reboot and hold down Command + R to boot into recovery mode and choose the terminal to execute the 'resetpassword' command.
I did it yesterday with a macbook that I bought used which the seller had done the same thing as you.