Once I had figured out how to package the PocketNotes AIR application for windows, I then had to address the same issues on apple desktop machines. I thought I was in the money when I googled on the topic and found this site by Serge Jespers on package-assistant-pro. Unfortunately it was built for AIR 2 so I moved on.
I googled for a dmg creator and finally settled on a simple package called dmgCreator which is available on sourceforge. “Creates compressed and internet enabled DMG files, i.e. for software distribution” which is all that I wanted to do.