PyMol - Molecular Visualization System originally written in Python by late Warren L. DeLano (he was Yale student). It is open source software now. Schrödinger, LLC compiles and sells ready-to-run binaries for Windows, Mac, and Linux. PyMOL is a trademark of Schrödinger, LLC.
Yale provides free Windows 64 bit distribution maintained for academic community by Christoph Gohlke, Laboratory for Fluorescence Dynamics, University of California, Irvine.
Subscription is free to all Yale community.
PyMol is available in the Yale MyApps virtual desktop service.
https://yale.service-now.com/it?id=support_article&sys_id=6503d80b1b6f80d0f5c70f22dd4bcbc1
SRSC can assist Mac users to build PyMol on Mac OS 10.9 - 11.4. This is a pilot, not fully tested method.
Documentation & Support
PyMol Wiki
https://pymolwiki.org/index.php/Main_Page
Science Research Software Core (SRSC)