The following is done in a Terminal window. One should first install some libraries:

   sudo port install gcc49
   sudo port install automake
   sudo port install autoconf
   sudo port install gtk3
   sudo port install gnome-themes-standard
   sudo port install librsvg
   sudo port install cfitsio
   sudo port install fftw-3
   sudo port install gsl
   sudo port install libconfig-hr
   sudo port install gnome-font-viewer