A modern macOS app for converting Sigma Merrill and Quattro X3F RAW files.

X3Fuse is a RAW conversion tool that converts your Sigma Merrill and Quattro X3F files into practical, compatible formats like DNG, TIFF, and JPEG. It's an essential bridge between your Sigma cameras and your preferred editing suite, including apps that use Adobe Camera Raw (Lightroom, Photoshop), LibRaw (Darktable, RawTherapee, RapidRAW), and Apple's RAW engine (Pixelmator, Photomator, Preview).

• Multiple Output Formats: Convert X3F files to DNG, TIFF, or JPEG formats
• Batch Processing: Process multiple files at once with an intuitive queue system
• Native macOS App: Built with SwiftUI for a seamless macOS experience
• EXIF Data Preservation: Attempts to preserve metadata like preferred aspect ratio
• Broad DNG Compatibility: Merrill and Quattro DNGs are tested with Adobe, LibRaw, and Apple RAW-based workflows
• Multi-language Support: Available in English, Spanish, Japanese, Korean, and Chinese*
• Drag & Drop Interface: Simple file management with drag and drop support
• Conversion Settings: Customizable output options for your workflow

_{*Don't see your language? Help us translate! See Contributing below.}

X3Fuse supports X3F files from Sigma cameras including Merrill and Quattro series cameras.

If you have a Sigma Foveon camera from the Merrill and Quattro generations that are not listed here, please let us know! We aim to support all Sigma Merrill and Quattro cameras and are actively looking for additional test files to improve compatibility.

• macOS 14.0 (Sonoma) or later
• Intel or Apple Silicon

1. Download the latest .zip from the Releases page
2. Extract the .zip file and move the X3Fuse.app to your Applications folder.
3. Launch X3Fuse.app from your Applications folder.

brew install --cask sagwaco/tap/x3fuse

Upgrade later with brew upgrade --cask x3fuse (the app also self-updates in-app via Sparkle).

1. Clone the repository:

   git clone https://github.com/sagwaco/x3fuse.git
   cd x3fuse

2. Open X3Fuse.xcodeproj in Xcode
3. Build and run the project (⌘+R)

./scripts/verify_universal_build.sh

This script verifies that the app and its components are properly built as universal binaries. It checks the architecture of the main app executable and any embedded binaries, ensuring they support both Intel and Apple Silicon architectures.

1. Launch X3Fuse from your Applications folder

2. Add Files:

   • Drag and drop X3F files onto the app window
   • Or use File → Open to browse for files

3. Configure Settings:

   • Choose your output format (DNG, TIFF, or JPEG)
   • Set output directory preferences
   • Adjust conversion options as needed

4. Convert:

   • Click the Convert button to start processing
   • Monitor progress in the queue view
   • Converted files will be saved to your specified location

X3Fuse creates DNGs that are designed to work across common RAW decoding engines, not only Adobe Camera Raw. Merrill and Quattro files, including DNGs created with RAW compression and/or Merrill highlight recovery enabled, have been tested successfully in:

• Adobe Lightroom and Adobe Photoshop
• Darktable
• RawTherapee
• RapidRAW
• Pixelmator and Photomator
• Preview on macOS

Foveon cameras do not have a color filter array (CFA) like most other cameras, so some RAW applications may still have Foveon-specific rendering differences. If you encounter an issue with a particular editor, please open a GitHub issue with the camera model, conversion settings, and target application.

X3I files generated in Quattro Super fine detail (SFD) mode are not supported. A workaround is to shoot several exposure bracketed images as X3Fs and then use X3Fuse to convert them to DNG. In a photo editing application like Lightroom, you can then merge the DNG files into an HDR image.

X3Fuse leverages:

• x3fuse-core: Core X3F file processing engine
• ExifTool: EXIF Metadata handling

x3fuse-core, which powers the x3f processing in x3fuse is based on x3f_tools. This project is not affiliated with nor endorsed by the creators of x3f_tools.

This project is licensed under the terms specified in the LICENSE file.

This project is not affiliated nor endorsed by Sigma Corporation. Sigma and Foveon are trademarks of Sigma Corporation.

Contributions are welcome! Please feel free to submit a Pull Request.

If you encounter any issues or have questions:

• Open an issue on GitHub Issues
• Check the Releases page for updates

X3Fuse processes all files locally on your Mac. No data is sent to external servers.