The 1.0 version of StarLogoTNG for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. The actual developer of this free Mac application is MIT Teacher Education Program. The most popular versions among the application users are 1.5 and 1.0. The software lies within Design & Photo Tools, more precisely 3D Modeling.
From the developer:
StarLogoTNG is a tool created to understand simulations of complex systems. Using StarLogo, students can study complex systems by creating elaborate 3D worlds for themselves. The program also brings with it several advantage like: 3D graphics and sound, a blocks-based programming interface, and keyboard input.
You may want to check out more Mac applications, such as formZ RenderZone Plus, ARES Commander Edition or Boris Graffiti, which might be related to StarLogoTNG.