Index: /issm/trunk-jpl/externalpackages/scipy/README
===================================================================
--- /issm/trunk-jpl/externalpackages/scipy/README	(revision 12539)
+++ /issm/trunk-jpl/externalpackages/scipy/README	(revision 12540)
@@ -1,2 +1,9 @@
-You will find instructions on scipy at: 
+For OSX 10.7 (Lion), the instructions here can be followed:  
 http://www.scipy.org/Installing_SciPy/Mac_OS_X
+
+For OSX 10.6 (Snow Leopard), the scipy folks recommend gcc and g++ version 4.0.
+However, ISSM needs the gfortran version recommended in $ISSM_DIR/externalpackages/gfortran.
+On the webpage listed above, make sure the "export CC" and "export CXX" commands point to the 
+binaries associated with this gfortran version (likely in /usr/local/gfortran/bin by default).
+Once this gfortran is installed, the install script in this directory for Snow Leopard should
+work.