I bought a new iMac yesterday. I am trying to log on this morning, and it will not allow me to type in my password. When I click in the password box there is no cursor flashing, and the word "password" stays in the box.
When you setup the iMac yesterday, how did you setup the account you are trying to login on? Did you set the account to allow use of the AppleID and/or security questions? Have you tried to startup in Safe Mode, by holding the shift key, what happens when you do that?