Index: /issm/trunk-jpl/packagers/mac/package-issm-mac-binaries-python-3.sh
===================================================================
--- /issm/trunk-jpl/packagers/mac/package-issm-mac-binaries-python-3.sh	(revision 27012)
+++ /issm/trunk-jpl/packagers/mac/package-issm-mac-binaries-python-3.sh	(revision 27013)
@@ -130,5 +130,5 @@
 
 	# Ensure that runme.py uses Python 3 interpreter
-	sed -i "s|/usr/bin/env python|/usr/local/bin/python3|g" ./runme.py
+	sed -i '' "s|/usr/bin/env python|/usr/local/bin/python3|g" ./runme.py
 
 	# Run tests, redirecting output to logfile and suppressing output to console