# ExtendFS

ExtendFS is a read-only ext2, ext3, and ext4 driver for macOS using [FSKit](https://developer.apple.com/documentation/fskit) and written in Swift. It's plug-and-play, with no kernel extension or messing with system security settings required.

macOS 15.6 or later is required.

## Download

You can either download the latest version from the [releases page](https://github.com/kthchew/ExtendFS/releases) on GitHub for free, or [purchase it from the Mac App Store](https://apps.apple.com/us/app/extendfs-for-linux-filesystems/id6755664332). There is no difference in functionality.

<a href="https://apps.apple.com/us/app/extendfs-for-linux-filesystems/id6755664332?mt=12&itscg=30200&itsct=apps_box_badge&mttnsubad=6755664332" style="display: inline-block;">
<img src="https://toolbox.marketingtools.apple.com/api/v2/badges/download-on-the-app-store/black/en-us?releaseDate=1763942400" alt="Download on the App Store" style="width: 245px; height: 82px; vertical-align: middle; object-fit: contain;" />
</a>

## Usage

1. Download and run the ExtendFS app.
2. Enable ExtendFS's file system extension in System Settings.

<picture>
    <source srcset="https://apps.kpchew.com/assets/file-system-extension-enablement-extendfs-light.png" media="(prefers-color-scheme: light)"/>
    <source srcset="https://apps.kpchew.com/assets/file-system-extension-enablement-extendfs-dark.png" media="(prefers-color-scheme: dark)"/>
    <img src="https://apps.kpchew.com/assets/file-system-extension-enablement-extendfs-light.png" alt="macOS System Settings screenshot showing the File System Extensions pane in Login Items & Extensions with 'ExtendFS (ext2/3/4)' enabled" width="400px" />
</picture>

Then, once you plug in your ext4-formatted drive or open your disk image, supported volumes will mount automatically, with no command line tools or manual mounting required.

If you do wish to use a command line tool, ExtendFS (like other FSKit extensions) integrates with the system's familiar tools, like the `mount(8)` command:

```shell
mount -t ExtendFS /dev/disk15 /tmp/mnt
```

## Known Limitations

Information on known limitations can be found on [the official website](https://apps.kpchew.com/extendfs/known-limitations).

## FAQ

Other information can be found on [the official website](https://apps.kpchew.com/extendfs/faq).

## Contributing

See the [contributing guidelines](CONTRIBUTING.md).

## License

[GPLv3 or later with app store exception](LICENSE.md)