What new camera do you have?
CS6 stopped getting updates with the ACR 9.1.1 release July 2015, but the current version of ACR is 9.6, so there have been almost a year of camera-support updates for ACR that CS6 will never get.
If you are able to open the raw files from your Nikon camera then Camera Raw is installed and working properly. But apparently there isn't support for your new camera. You can download and use the DNG converter to create DNG copies that will work with camera raw 9.11. There isn't going to be another update of Camera Raw for Photoshop CS6.
Here is the list of cameras currently supported by Camera Raw, and the minimum version required for each camera:
Apparently all I needed to do was install updates for my Photoshop! Thank you for your reply!