i bought ardour but he ask me authorization,where i find it?and how i write on the installer this autoriz.?i wasnt sign inthe site of ardour but now i m.can u help me?thanks
and what i need yo instal togheter?jack softw…x11?

There is no authorization. Ardour is GPL’ed software - no copy protection, no authorization. You are free to copy it, read the source code, do whatever you want with it (with certain provisos, see the GPL for details). There is no installer - after downloading you should end up with a standard OS X application bundle that you can click on to run. You must have JACK installed and you should have read X11 is not needed.