If you are encountering Update Error U43M1D204, see this article.
If you still haven't been able to successfully update the Camera Raw plug-in for CS6, CC, CC 2014, CC 2015 Adobe applications, use the installers below.
Download the appropriate file below, and then follow these instructions:
Windows
Exit from your Adobe applications.
Double-click the downloaded CameraRaw_9_1.zip to unzip it. Windows might unzip the file for you.
Double-click the resulting CameraRaw_9_1.exe file to start the installer.
Follow the onscreen instructions.
Restart your Adobe applications.
Mac OS
Quit all Adobe applications.
Double-click the CameraRaw_9_1.pkg.zip file to unzip it.
Double-click the CameraRaw_9_1.pkg file to start the installer.
Follow the onscreen instructions.
Restart your Adobe applications.