I have a DMG I password protected a couple years ago and I have no clue as to what the password is. I would like to recover its contents, and I was wondering if there were any password cracking programs out there to do this efficiently. I could write my own but I doubt it'd be very quick about it. It's alphanumeric as well as having some special characters (!@#$%^&*()_) I know it could take a while, I want to run it when my computer would otherwise be idle--probably for some weeks, I'd imagine.