I’ve downloaded the trial version of DropDMG and overall I’m pleased with the UI and the functionality.
However, there is one essential thing I couldn’t figure out:
The Mac terminal tool hdiutil has a great feature called ‘shadow file’. I use this quite often to apply changes to compressed images, i.e. mounting the image with a shadow file, applying changes to the image content and then converting the image with the shadow file to a new compressed image (hdiutil convert … <image.dmg> -shadow -o <newimage.dmg>).
In DropDMG I figured out how to mount an image with a shadow file, but I’m missing the second part, that is converting the image with the modified shadow file to a new image. DropDMG converts the image but ignores the shadow file. I also tried to drag the image to DropDMG with the option key down, but I can’t see any optional setting for this. I even tried to drag the image file and the shadow file to DropDMG but it doesn’t recognize the shadow file as belonging to the image file.
Can you enlighten me?