Password not working (it said the password I typed in was wrong)
It has been a while since I have tried this so I assume it still works


Turn off your Mac (choose Apple > Shut Down). 
Press the power button  while holding down Command-R. The Mac will boot into Recovery mode.
Select Disk Utility and press Continue. 
Choose Utilities > Terminal. 
Enter resetpassword (all one word, lowercase letters) and press Return.
Select the volume containing the account (normally this will be your Main hard drive).
Choose the account to change with Select the User Account.
Enter a new password and re-enter it into the password fields.
Enter a new password hint related to the password &amp; click Save.
A warning will appear that the password has changed, but not the Keychain Password. Click OK.
Click Apple > Shut Down.
Now start up the Mac. You can login using the new password.


Or you could google "reset mac password" and follow the instructions I found and pasted in above.