diff --git a/dist/platforms/mac/steps/return_license.sh b/dist/platforms/mac/steps/return_license.sh
index 67db4182..423a32f0 100755
--- a/dist/platforms/mac/steps/return_license.sh
+++ b/dist/platforms/mac/steps/return_license.sh
@@ -9,6 +9,8 @@ pushd "$ACTIVATE_LICENSE_PATH"
   -batchmode \
   -nographics \
   -quit \
+  -username "$UNITY_EMAIL" \
+  -password "$UNITY_PASSWORD" \
   -returnlicense \
   -projectPath "$ACTIVATE_LICENSE_PATH"