On Windows, if you execute: "jpackage --name foo --runtime-image bar" you will create an installer foo-1.0.exe which when run will install a runtime in "C:/Program Files/foo".
On Mac if I execute "jpackage --type pkg --name foo --runtime-image bar --mac-package-name foobar --install-dir ~" It will create foo-1.0.pkg which when run will install a runtime in "~/bar".

Shouldn't that be "~/foo" ?