Adding OSX check

configure.ac

@@ -41,6 +41,9 @@ m4_ifdef([AX_EIGEN],,[m4_include([m4/ax_eigen.m4])])
 m4_ifdef([AX_LIB_HDF5],,[m4_include([m4/ax_lib_hdf5.m4])]])
 
 case $host_os in
+   *darwin*|*macosx*)
+	AC_DEFINE([HAVE_OSX],[],[We have OSX])
+	;;
    *cygwin*)
         # Do something specific for cygwin
         CXXFLAGS+=" --std=gnu++11 "

src/Decomposition/Distribution/metis_util_unit_test.hpp

@@ -70,8 +70,14 @@ BOOST_AUTO_TEST_CASE( Metis_test_use)
 
 	// check that match
 
+#ifdef HAVE_OSX
+	bool test = compare("vtk_metis_util_gp.vtk","src/Decomposition/Distribution/test_data/vtk_metis_util_gp_osx_test.vtk");
+	bool test2 = compare("vtk_metis_util_g.vtk","src/Decomposition/Distribution/test_data/vtk_metis_util_g_osx_test.vtk");
+#else
 	bool test = compare("vtk_metis_util_gp.vtk","src/Decomposition/Distribution/test_data/vtk_metis_util_gp_test.vtk");
 	bool test2 = compare("vtk_metis_util_g.vtk","src/Decomposition/Distribution/test_data/vtk_metis_util_g_test.vtk");
+#endif
+
 	BOOST_REQUIRE_EQUAL(true,test);
 	BOOST_REQUIRE_EQUAL(true,test2);
 }