Download of OpenGL Extensions Viewer 6.3.3 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software relates to Design & Photo Tools. This free Mac application is a product of realtech VR. We recommend checking the downloaded files with any free antivirus.
From the developer:
OpenGL Extensions Viewer provides info about your OpenGL accelerator. Many OpenGL extensions, as well as extensions to related APIs, have been defined by vendors. The extension registry is maintained by SGI. Features: Contains specifications for all known extensions, written as modifications to the appropriate specification documents. Defines naming conventions, guidelines for creating new extensions, and writing suitable documentation.
You may want to check out more Mac applications, such as MOOS Project Viewer, Project Viewer 365 or opengl, which might be related to OpenGL Extensions Viewer.