=== Mac Os X 10.5 (Leopard) ===

1. Install root from source : ftp://root.cern.ch/root/root_v5.32.01.source.tar.gz
   compile it: 
   {{{
   ./configure macosx
   make
   }}} 
   and configure the environment variable (in .bashrc) ROOTSYS, LD_LIBRARY_PATH, PATH