You could have downloaded Visual Understanding Environment 3.3.0 for Mac from our application library for free. The application is categorized as Design & Photo Tools. Our antivirus check shows that this Mac download is virus free. The actual developer of this free Mac application is Tufts University.
From the developer:
isual Understanding Environment (VUE) is a concept and content mapping application, developed to support teaching, learning and research and for anyone who needs to organize, contextualize, and access digital information. Using a simple set of tools and a basic visual grammar consisting of nodes and links, faculty and students can map relationships between concepts, ideas and digital content.
You may want to check out more software for Mac, such as Visual SlideShow, Visual Paradigm Project Viewer or Visual Studio Code, which might be related to Visual Understanding Environment.
IDE
Teaching Tools