Downloading SystemModeler 3.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
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. The software relates to Education Tools. This Mac app is a product of Wolfram Research, Inc. The following version: 3.0 is the most frequently downloaded one by the program users.
From the developer:
Wolfram SystemModeler is a complete physical modeling and simulation tool. This program requires no add-ons and fully supports the standard Modelica model language. Also SystemModeler is designed to connect perfectly with Mathematica for the ultimate integrated modeling, simulation, and analysis workflow.
You may want to check out more software for Mac, such as Solar Walk - 3D Solar System model, which might be similar to SystemModeler.
3D Design