Within Photoshop CS5, go to Help > Updates... to see if the automated installer can still pull the final 6.7 patch.
This specific version (6.7.x) represents the end of the line for CS5 compatibility. It was designed to bridge the gap for photographers who needed to process RAW files from then-new cameras without upgrading to the subscription-based Creative Cloud or even Photoshop CS6. adobe camera raw 6.7 download
Before downloading Adobe Camera Raw 6.7, ensure that your computer meets the following system requirements: Within Photoshop CS5, go to Help > Updates