Where are the temporary passwords located on mac When I try to access my Mac Pro Desktop from my MacBook Pro, it doesn't let me connect to Mac Pro anymore , I think I've changed the password without ticking the box: "Remember this password in my keychain" 

The problem is, I cannot find the password in order to connect to Mac Pro Desktop.

I have researched this problem on the forum and have looked at my keychains, on which no item exists relating to this problem. I also created a test account on the Mac Pro Desktop  and tried to connect to the  Mac Pro Desktop as a registered user, but that user name and password was also deemed invalid.

Does anyone know where the passwords which are not saved where they are stored on a Mac or  creating a new password or making the Mac Pro Desktop to see the MacBook Pro  as a new Machine?
When you don't check the ‘Remember this password in my keychain’ box, that's not to say the password is remembered somewhere else, but rather that the password isn't remembered at all.

I'm inclined to believe the problem is elsewhere. This is exemplified by the inability to connect using a completely new account.