Index: Makefile
===================================================================
--- Makefile	(revision 168501)
+++ Makefile	(working copy)
@@ -296,7 +296,7 @@
 
 ifneq ($(findstring darwin,$(OSARCH)),)
   ASTCFLAGS+=-D__Darwin__
-  SOLINK=-dynamic -bundle -undefined suppress -force_flat_namespace
+  SOLINK=-dynamic -bundle -undefined suppress -force_flat_namespace -macosx_version_min 10.3
 else
 # These are used for all but Darwin
   SOLINK=-shared