diff -r 93db8a13c4c5 -r 628a283daa6c src/jdk.packager/macosx/classes/jdk/packager/internal/resources/mac/MacBaseInstallerBundler.properties
--- a/src/jdk.packager/macosx/classes/jdk/packager/internal/resources/mac/MacBaseInstallerBundler.properties	Mon Sep 17 16:22:44 2018 -0400
+++ b/src/jdk.packager/macosx/classes/jdk/packager/internal/resources/mac/MacBaseInstallerBundler.properties	Mon Sep 17 19:14:56 2018 -0400
@@ -28,6 +28,9 @@
 error.parameters-null=Parameters map is null.
 error.parameters-null.advice=Pass in a non-null parameters map.
 
+message.app-image-dir-does-not-exist=Specified application image directory {0}\: {1} does not exists
+message.app-image-dir-does-not-exist.advice=Confirm that the value for {0} exists
+
 message.could-not-retrieve-name=Could not retrieve gecos name
 message.app-image-requires-app-name=When using an external app image you must specify the app name.
 message.app-image-requires-app-name.advice=Set the app name via the -name CLI flag, the fx:application/@name ANT attribute, or via the 'appName' bundler argument.