DMG Tool version 3

What is it?

DMG Tool was created to simplify the process of creating compressed disk images in Mac OS X. It's specifically designed for speed. The minimum you need to do is enter text into one field and click two buttons.

What do you need?

To use DMG Tool you need Mac OS X 10.2 or higher.

How to use it.

  1. Double-click the DMG Tool icon.
  2. Enter a file name.
  3. Enter a volume size.
  4. Enter a volume name.
  5. Click "Create".
  6. Copy files the mounted image.
  7. Click "Finish" to quickly compressed and finalized the image to the Desktop.
  8. Click "Save" to choose the save location for the finalized image.

How it works.

DMG Tool is an AppleScript Studio GUI front end for the command line tool hdiutil. The commands used are hdiutil create, hdiutil convert, hdid, mv and rm. Since it makes use of the command line tools exclusively there are a few gotchas as noted below.


Since the mv command is destructive making two images with the same filename back-to-back will destroy the first file created by over writing it. This shouldn't happen too often, shouldn't happen at all really, but I'm noting it here.

All the methods I've used to get folder sizes have their little flaws. so I decided on the best one.

What's New



Future Plans



Find any bugs or want to make a feature request email me at


DMG Tool version 3

DMG Tool version 2.7.3 (Mac OS X 10.1.2 to 10.1.5)