If the standard installer fails, particularly for Photoshop Elements users, a manual workaround exists: Download the latest installer and run it. Navigate to the common plug-ins folder:
/Library/Application Support/Adobe/Plug-ins/CC/File Formats Download Adobe Camera Raw zip
Complete the on-screen installation instructions and restart your Adobe applications. Troubleshooting & Manual Installation If the standard installer fails, particularly for Photoshop
Use this for legacy Adobe applications that no longer support the newest ACR updates. Installation Steps If the standard installer fails