dmgutil 1.3 for Mac can be downloaded from our website for free. Dmgutil for Mac lies within System Tools, more precisely File Compression.
From the developer:
dmgutil is an Open Source command line tool for creating, configuring, and compressing Mac OS X disk images for distribution.
dmgutil supports programmatic creation of disk images - allowing you to configure a background image, set window/icon sizes and positions, and apply custom icons prior to compressing the image for release.
You may want to check out more software for Mac, such as NoLimits Pack Extractor, Secret Missions - Mata Hari and the Kaiser's Submarines or Emicsoft MPEG Converter for Mac, which might be similar to dmgutil.