Can I see all locations that a DMG file install files to? I wonder if there is a way to sort of "unroll" a dmg file and reveal which directories it will install files to?
A DMG (Disk Image) file is like a zip file.
It's compressed and has a check built-in to check if the integrity of the app is intact.
Once you open a DMG file, in most cases, you just have to drag/drop the application into you Applications folder and that's it.
If you want to see the full content of that application, go to
Applications folder
Right click on an app
Select 'Show the ... content'
In the 'Contents' directory, you'll see all dirs and files that came with your app.
I don't know if that's the answer your are looking for?