--- /dev/null	2018-10-22 10:35:39.000000000 -0400
+++ new/src/jdk.packager/macosx/classes/jdk/packager/internal/resources/mac/preinstall.template	2018-10-22 10:35:37.327167300 -0400
@@ -0,0 +1,8 @@
+#!/usr/bin/env sh
+
+set -e
+if launchctl list "DEPLOY_DAEMON_IDENTIFIER" &> /dev/null; then
+    launchctl unload "/Library/LaunchDaemons/DEPLOY_LAUNCHD_PLIST_FILE"
+fi
+
+exit 0