diff --git a/Makefile b/Makefile
index fb3c2c8ff6..cd3a52311f 100644
--- a/Makefile
+++ b/Makefile
@@ -92,7 +92,8 @@ bins: stdlib
 stdlib:
 # cargo run ${CARGO_ARGS} -p diem-framework
 	cargo run ${CARGO_ARGS} -p diem-framework -- --create-upgrade-payload
-	sha256sum language/diem-framework/staged/stdlib.mv
+# linux uses sha265sum, but not available by default on OS X
+	bash -c "sha256sum language/diem-framework/staged/stdlib.mv || shasum -a 256 language/diem-framework/staged/stdlib.mv"
   
 
 install: mv-bin bin-path
@@ -301,8 +302,8 @@ genesis: stdlib
   --layout-path ${DATA_PATH}/set_layout.toml \
 	--val-ip-address ${IP}
 
-
-	sha256sum ${DATA_PATH}/genesis.blob
+# linux uses sha265sum, but not available by default on OS X
+	bash -c "sha256sum ${DATA_PATH}/genesis.blob || shasum -a 256 ${DATA_PATH}/genesis.blob"
 
 #### NODE MANAGEMENT ####
 start: