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Where are you downloading the file from? What are the specs of your machine (model, hardware, OS)? Are you able to open other DMG files on the machine?
-B
@BennettS (Dolby Labs) hey, I'm downloading from " https://developer.dolby.com/tools-media/production-tools/dolby-atmos-production-tools/ ". I'm running a Hackintosh with Mac OS 10.11.6 (El Capitan), 16 GB ram, 3.19 GHz Intel Core i5 Processor. yeah, I'm able to open other DMG files on my machine. I tried opening the dmg file from another mac machine (friend's), still the same error.
@AdamP (Dolby Labs) I'm running the installer from local storage :)