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Replying to panos@…:
---> Scanning binaries for linking errors
Could not open QGLViewer.framework/Versions/2/QGLViewer: Error opening or reading file (referenced from /opt/local/lib/libPS_demo_scene_basic_objects.dylib)
You have obviously installed QGLViewer manually and the cgal port picked up this version instead of MacPorts' own version in the libQGLViewer port. Please uninstall QGLViewer (MacPorts already installs QGLViewer as a non-framework build for you) and try to rebuild cgal.