Hi Alex,
We created also an .app file that consist the bootstrap.jar, together with this .app we created a .dmg file that also has an OpenJDK installer so that the installation are two steps. Step 1: Install the OpenJDK and Step 2: Drag the .app to the application folder. For creating the .app file i’ve used this http://www.zitnik.si/wordpress/2016/02/21/creating-a-mac-os-app-from-a-runnable-jar-file/ documentation. For creating the dmg we are using DropDMG.
Mark