Steps to produce the problem 1. Change to Myanmar Font in keymagic 1.4 on Mac OSX 10.6.7 2. Lock the computer 3. keyboard layout is stucked in Myanmar font and cannot login back. (Using hotkey to change keyboard layout does not work) 4. Force shut down and reboot was done and still stuck at Myanmar Keyboard layout. ---------- I needed to reboot in single user mode and needed to follow the root user reset guides and changed the password to blank and i could log back in. Is there any other way to solve that problem?