The full application install instructions are found on the project WIKI site. On Mac OSX, the brew package for RNAStructViz is installed by running:

$ brew install gtDMMB/core/rnastructviz

To reinstall the package from a previous release, run the following:

$ brew update
$ brew reinstall gtDMMB/core/rnastructviz

Now run the application at your terminal by typing RNAStructViz. Refer to the first-run instructions for pointers on how to configure RNAStructViz the first time you run it.