The is the "end of the road" for Photoshop CS6 users, offering the most stable and feature-rich experience possible for that version of the software. While it doesn't support the latest mirrorless cameras natively, it remains a vital tool for photographers who prefer the perpetual license model over a monthly subscription.
It added support for newer cameras at the time, such as the Nikon D750 (with specific configurations) and improved loading for Fuji X-Trans sensors. Math Improvements:
Adobe hosts legacy updates on their FTP site. You can access it via your web browser: