ExtendFS

ExtendFS provides read‑only access to Linux ext2, ext3, and ext4 file systems on macOS Sequoia (15.6) and later. It operates entirely in user space through Apple’s FSKit framework, eliminating the need for kernel extensions or security‑lowering steps. The driver is written in Swift, sandboxed like any Mac App Store app, and automatically mounts supported volumes so they appear in Finder without terminal commands.

The utility is aimed at users who need to retrieve files from Linux‑formatted external storage—such as USB drives, SSDs, HDDs, SD cards, or disk images—on Intel or Apple‑silicon Macs. By leveraging FSKit rather than FUSE‑based solutions, ExtendFS maintains system integrity while offering a plug‑and‑play experience.

The project is open source under the GPL and is considered stable. Source code is hosted on GitHub, and a binary version is available through the Mac App Store with identical functionality.