You have a subscription version of Photoshop CC 2017 or newer. Solution: If you have CC 2017 or 2018, you should actually use a newer ACR version (10.x or 11.x). Adobe has locked the installers. Uninstall your current Camera Raw via the Creative Cloud app instead of using the 9.12.1 standalone.
If your version of Photoshop does not support ACR 9.12.1, you must use the free Adobe DNG Converter to transform your RAW files into a format your older software can recognize. How to Download and Install
The 9.12.1 update was primarily a maintenance and compatibility release following the major 9.12 update. Its main highlights include: : Adds compatibility for the Nikon D850 Go to product viewer dialog for this item. . Lens Profile Updates : Included four new Nikkor lenses. Magenta Cast Fix : Resolved a specific issue where mRaw and sRaw images from the Canon EOS 6D Mark II Go to product viewer dialog for this item. displayed a magenta color cast. camera raw 9.12.1 download
ACR 9.12.1 added critical optical correction data for a suite of new Nikkor lenses, including:
For users who prefer to download the plugin directly or need to reinstall it: You have a subscription version of Photoshop CC
Search for the official page.
Adobe Photoshop CS6, Adobe Photoshop CC (2015/2017), or Adobe Bridge CS6/CC. Uninstall your current Camera Raw via the Creative
: Users typically find older installers through the Adobe Camera Raw installer page, though 9.12.1 may now be hosted in their "Legacy" or "Archive" sections.