In reply to Unprivileged User (nobody@xserve.blender.org): I forgot to add that I added: AC_CHECK_HEADER([/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/gl.h]) AC_CHECK_HEADER([/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers/glu.h]) to configure.ac for OSX Kent -- mein@cs.umn.edu