Hi WelshWizzard,
I have some bad news and good news for you.
The bad news is that the version of ACR that was on your computer (9.1.1) is the most recent version of ACR that can be run by PS-CS6. Adobe stopped supporting CS6 years ago.
The good news is that you can download the Adobe DNG Converter
Adobe Digital Negative Converter
which can convert your raw images into DNG images and those can be processed through your current CS6 and ACR 9.1.1.
Remember: to use the DNG converter, have a folder of your raw images, and select that with the DNG Converter and start the process. It will then go through each of the raw images and convert them into DNGs and then will stop. You can toss (or keep) the raw images at this point. [FWIW, I've been tossing my raw images for many many years and rely solely upon the DNG images.]
One caveat: You didn't mention what your new camera is (BTW big congrats on the new camera), but if it's VERY new, it is possible to be so new that Adobe has not had a chance to update their software to do the conversion. You can check the following website to see if your camera is listed. If not it should be within a month or three. (No one announces this schedule ahead of time so no know outside of Adobe knows this info.
Cameras supported by Camera Raw
Please let us know if this helps you,