diff --git a/MPI/boost/files/variants.macos10.14 b/MPI/boost/files/variants.macos10.14
new file mode 100644
index 0000000..2b3b201
--- /dev/null
+++ b/MPI/boost/files/variants.macos10.14
@@ -0,0 +1,2 @@
+boost/1.70.0         unstable	gcc/8.3.0 openmpi/3.1.3 b:zlib/1.2.11
+
diff --git a/MPI/boost/files/variants.rhel6 b/MPI/boost/files/variants.rhel6
index de67be2..9e396d8 100644
--- a/MPI/boost/files/variants.rhel6
+++ b/MPI/boost/files/variants.rhel6
@@ -1,16 +1,17 @@
-boost/1.66.0         unstable	gcc/7.3.0 openmpi/3.0.0 b:Python/2.7.14
+boost/1.66.0         stable	gcc/7.3.0 openmpi/3.0.0 b:Python/2.7.14
 
-boost/1.68.0         unstable	gcc/7.3.0 openmpi/1.10.7 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/7.3.0 openmpi/2.1.5 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/7.3.0 openmpi/3.0.0 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/7.3.0 openmpi/3.1.2 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/7.3.0 openmpi/3.1.3 b:Python/2.7.14
-boost/1.68.0-1       unstable	gcc/7.3.0 openmpi/3.1.3 b:zlib/1.2.11
+boost/1.68.0         stable	gcc/7.3.0 openmpi/1.10.7 b:Python/2.7.14
+boost/1.68.0         stable	gcc/7.3.0 openmpi/2.1.5 b:Python/2.7.14
+boost/1.68.0         stable	gcc/7.3.0 openmpi/3.0.0 b:Python/2.7.14
+boost/1.68.0         stable	gcc/7.3.0 openmpi/3.1.2 b:Python/2.7.14
+boost/1.68.0         stable	gcc/7.3.0 openmpi/3.1.3 b:Python/2.7.14
+boost/1.68.0-1       stable	gcc/7.3.0 openmpi/3.1.3 b:zlib/1.2.11
+boost/1.70.0         unstable	gcc/7.3.0 openmpi/3.1.3 b:zlib/1.2.11
 
-boost/1.68.0         unstable	gcc/8.2.0 openmpi/1.10.7 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/8.2.0 openmpi/2.1.5 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/8.2.0 openmpi/3.0.0 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/8.2.0 openmpi/3.1.2 b:Python/2.7.14
-boost/1.68.0         unstable	gcc/8.2.0 openmpi/3.1.3 b:Python/2.7.14
+boost/1.68.0         stable	gcc/8.2.0 openmpi/1.10.7 b:Python/2.7.14
+boost/1.68.0         stable	gcc/8.2.0 openmpi/2.1.5 b:Python/2.7.14
+boost/1.68.0         stable	gcc/8.2.0 openmpi/3.0.0 b:Python/2.7.14
+boost/1.68.0         stable	gcc/8.2.0 openmpi/3.1.2 b:Python/2.7.14
+boost/1.68.0         stable	gcc/8.2.0 openmpi/3.1.3 b:Python/2.7.14
 
-boost/1.68.0-1       unstable	gcc/7.3.0 mpich/3.3 b:zlib/1.2.11
+boost/1.68.0-1       stable	gcc/7.3.0 mpich/3.3 b:zlib/1.2.11