You could have downloaded DDCut 1.0.3 for Mac from our software library for free. This free Mac application was originally developed by Ghost Gunner. DDCut for Mac lies within Design & Photo Tools, more precisely Viewers & Editors.
From the developer:
DDcut replaces arduous CNC concepts with step-by-step setup instructions and automated milling code. DDcut’s simple software interface is solely designed to interpret ‘.dd’ files, allowing users to create predefined objects without part-specific manufacturing knowledge. DDcut doesn’t generate .dd files.
You may want to check out more software for Mac, such as QuickShow OSX, Stone Studio or Dock Icon Viewer, which might be similar to DDCut.