NOTES FOR LION USERS 1 - The Gnuplot app and MacOS 10.7.3 Running the gnuplot app present in the Extra's folder results in the error below. dyld: Library not loaded: /usr/X11/lib/libfreetype.6.dylib Referenced from: /usr/X11/lib/libfontconfig.1.dylib Reason: Incompatible library version: libfontconfig.1.dylib requires version 14.0.0 or later, but libfreetype.6.dylib provides version 13.0.0 The problem has been described in some detail at the link below. http://sourceforge.net/mailarchive/message.php?msg_id=28805743 Two work arounds are available. 1.1) Repair the Gnuplot-4.4.3 included with Octave-3.4.0 DMG Open /Applications/Gnuplot.app/Contents/Resources/bin/gnuplot in a text editor. Use the editor search-and-replace feature to replace "DYLD_LIBRARY_PATH" with "DYLD_FALLBACK_LIBRARY_PATH". There are four instances that need to be replaced. 1.2) Use Gnuplot-4.2.6 that is bundled with Maxima DMG. Link below. http://sourceforge.net/projects/maxima/files/Maxima-MacOS/5.26.0-MacOSX/