diff --git a/MPI/trilinos/12/variants.Darwin b/MPI/trilinos/12/variants.Darwin
index f8e3d1d..c63d7b8 100644
--- a/MPI/trilinos/12/variants.Darwin
+++ b/MPI/trilinos/12/variants.Darwin
@@ -12,3 +12,4 @@ trilinos/12.10.1	unstable	gcc/6.2.0 openmpi/1.10.4 b:cmake/3.6.3 b:OpenBLAS/0.2.
 trilinos/12.12.1	unstable	gcc/7.3.0 openmpi/1.10.7 hdf5/1.10.1 b:cmake/3.6.3 b:OpenBLAS/0.2.20 b:parmetis/4.0.3 
 trilinos/12.12.1	unstable	gcc/7.3.0 openmpi/2.1.2  hdf5/1.10.1 b:cmake/3.6.3 b:OpenBLAS/0.2.20 b:parmetis/4.0.3 
 trilinos/12.12.1	unstable	gcc/7.3.0 openmpi/3.0.0  hdf5/1.10.1 b:cmake/3.6.3 b:OpenBLAS/0.2.20 b:parmetis/4.0.3 
+trilinos/12.12.1	unstable	clang-macos/9.0.0 openmpi/3.0.0 hdf5/1.10.1 b:cmake/3.9.6 b:OpenBLAS/0.2.20 b:parmetis/4.0.3