OSX 10.9.2: Stuck at quick user switch I want to quick switch to the other user in the system, but this login screen has stay there for almost half an hour



Can I cancel the login via command line or other keyboard combination? I can ssh into the box as an admin

/EDIT: I want avoid reboot or shutdown
I had the same problem and it turned out the computer was looking for an external hard drive to mount that wasn't connected properly. If you have any external hard drives, you may want to try unplugging them and then doing a forced restart?