Can anyone help me. Yesterday I installed the first os update since I installed mountain lion on my 2010 MacBook Pro. All went as normal for a bit until a message came up saying it was unable to complete the update and was going to restart. Fair enough I thought until it returned me to my login screen. My password no longer worked. I tried a few recent passwords in case it had stepped back in time. No joy. So I tried to use my master password to reset the password. Again, It had forgotton that too. So I am now locked out. Anyone got any ideas? My next move is to put it into target drive mode with a FireWire to thunderbolt cable and pull off my aperture library and a few other things and then clean install post disk format but I am open to easier alternatives if anyone has any suggestions. Thanks.