DiskImageMounter is the utility that handles mounting disk volume images in Mac OS X, starting with version 10.3. DiskImageMounter works by either launching a daemon to handle the disk image or by contacting a running dæmon and have it mount the disk.
Like BOMArchiveHelper, DiskImageMounter has no GUI when double-clicked; in fact, doing so does nothing. The only GUI the program ever displays is a window with a progress bar and mount options (cancel or skip verification) or an error report on why it could not mount the image. It is found in /System/Library/CoreServices/DiskImageMounter.app.