The Geant4-DNA extension is fully included in the Geant4 public distribution. It is located in the $G4INSTALL/source/processes/electromagnetic/dna directory. It requires a set of data files, the G4EMLOWX.Y set of data files. Refer to the Geant4 homepage for Geant4 installation instructions.

Alternatively, for users who do not wish to install Geant4 by themselves, we also propose a
Geant4 virtual machine for VMWare™ for Windows™ or Mac OS™, freely available for download at this link.

You may follow the updates of our Geant4 Virtual Machines for VMWare™ on Twitter @ Geant4VM