My user name does not appear on the login screen. There are two users and only one is shown.
Is there any way to see the other user or some user name input box instead of selection?
Press the Down arrow on the keyboard to highlight any user (make sure the password entry box is NOT open.)
Press Option + Return on the keyboard.
This should bring up the username and password fields on the login screen.
Edit (from the comment "How can I change when I am not able to login")
If you can't login with the only user available on the interface, I presume you don't know the password?
If so, you may try the following to set a new one:
ls -l /Usersto list your user accounts
Then, with replacing
/sbin/fsck -fy /sbin/mount -uw / launchctl load /System/Library/LaunchDaemons/com.apple.opendirectoryd.plist dscl . -passwd /Users/username new_password exit
Or, another option, if you have a MacOS install disk:
Start with your install disk (reboot with Alt, go to Terminal from the top menu, and type
However, if you can't login with "List of users", chances are you won't be able to login with "Name and password" option either.
You may check your user accounts on that same panel for examination.