Download of g4view 1.3 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version among g4view for Mac users is 1.3. The program is categorized as Design & Photo Tools. You can install g4view on Mac OS X 10.6 or later. This free Mac app was originally designed by Guy Barrand. We recommend checking the downloaded files with any free antivirus.
From the developer:
G4view is a scientific application that permits to read geometry files at the Geant4 GDML format describing particle physics detectors. The app permits to visualize the geometry of a loaded detector. It can read also "scenarios" files that permit to choose the volumes seen from GDML, strongly customize their graphical attributes as the coloring or the wire frame/solid rendering.
You may want to check out more Mac applications, such as PulpMotion Advanced, I Can Animate or PDF Studio, which might be related to g4view.