2015-04-18 8:55:25.504 AM happrentice: WARNING: The Gestalt selector gestaltSystemVersion is returning 10.9.3 instead of 10.10.3. Use NSProcessInfo's operatingSystemVersion property to get correct system version number.
Call location:

thus i realized that Utility and Administrative folders were locked by root
so i
sudo chmod 777 /Applications/houdini…/Utility , same for admin folders
then
relaunch Houdini Apprentice, then pop up the Apprentice licensing
after licensing , houdini run ok , even with the error message in the console

hope it ll help