My title is my "error" that I am facing in the Terminal when setup the ejabberd.
What I did.
./postinstall.sh cesare jerry.local password
WARNING ! ejabberd can not start Admin user is not created Please check your configuration
You do not need to run
postinstall.sh script as it is already run by the installer and create the admin user for you. If you have had no error message from the installer, you should already be set. You can just call ejabberd start script.
Please make sure that you also approve listening on ports if OSX firewall ask you to authorise it. Ensure also that the user installing ejabberd has admin rights.