Here is the lore, the treasure map, and the warning label for finding this legendary piece of software. Adobe CS6 was released in 2012. By 2015, Adobe wanted you to move to Creative Cloud. So, they threw the old dogs a bone: Camera Raw 9.1.1 was the final update they ever released for CS6.
Let me paint you a picture. It’s 2015. The world is listening to The Weeknd on repeat, everyone is still fighting about the "dress" (blue and black, obviously), and Adobe drops Camera Raw 9.1.1 .
You will see websites offering the AdobePatchInstaller file. But be warned: The internet is full of "cracked" versions and malware disguised as old installers.