Download of CrystalMaker 10.8.3 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. This software for Mac OS X is a product of CrystalMaker Software. CrystalMaker for Mac is included in Education Tools. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe.
From the developer:
CrystalMaker is a program for building, displaying and manipulating all kinds of crystal and molecular structures. Spectacular, photo-realistic models are just one drag-and-drop away. CrystalMaker can auto-detect major file formats and generate structures right away. All aspects of the model can be extensively customized, with a wide range of photo-realistic or stylized
You may want to check out more Mac applications, such as RAAViewer, MoonMenu or clustalx, which might be related to CrystalMaker.
Science Tools