log in trouble shooting

When i load the game from the desktop it starts up with choppy graphics,i cant click anything on the log in screen but i can move the move. I hit enter to log in and again to pick my character, but when i get to lioneye i still cant click anything or move but my commands work. i played the game yesterday with no problems, if someone could help me out i would appreciate it. I am playing on OS 10.8 mountain lion