With Arduino Software 1.6.2/1.6.3 for Mac it is not possible, to enter a UniCode or diacritical Character in the IDE. You cannot make comments with them and you cannot use them in Strings. Up to Version 1.6.1 everything was OK. I urgently need them for comments and for Strings to display on a terminal screen. Copy and paste works as a workaround but is no solution.