--- a/admin/data/rename.sh
+++ b/admin/data/rename.sh
@@ -1,4 +1,11 @@
 #!/bin/bash
+
+if [[ "$OSTYPE" =~ ^darwin ]]; then
+    alias md5='md5 -r'
+    alias md5sum='md5 -r'
+    # https://sagebionetworks.jira.com/wiki/display/PLFM/Fixing+sed+on+OSx
+    alias sed='gsed'
+fi
 
 for file in ./*.xls
 do