Guillaume Borios fixed bug #508 When unicode translation is ON, pressing the escape key raise an NSBeep() because the NSTextView interprets the key as a special command (in that case impossible to interpret)... The NSTextView instance should replaced by something subclassed so that doCommandBySelector: does nothing. Example code : @interface SDLTranslatorResponder : NSTextView { } - (void) doCommandBySelector:(SEL)myselector; @end @implementation SDLTranslatorResponder - (void) doCommandBySelector:(SEL) myselector {} @end