Now available via HomebrewSee install commands

Write to NTFS.On your Mac.

No reformatting. Enable writing from the menu bar, then copy files in Finder.

Get the development appView source
Finding mouNTFS useful? Give it a star.Star on GitHub ↗

macOS 13+ · Requires macFUSE, ntfs-3g and system permissions. Development builds are ad-hoc signed and not notarized.

Free & open source · For macOS

Actual mouNTFS menu with a sample drive marked writable
Actual app UI · Sample drive data · UI currently in English
Keep NTFS

Use the drive you already have.

Continue in Finder

Copy and edit files after enabling writing.

Free & open source

MIT licensed. No app license activation.

Your drive. Your usual workflow.

After driver setup, everyday use starts in the menu bar.

01

Connect your drive

Open mouNTFS and select the external NTFS partition you want to use.

02

Enable writing

Choose Enable Write Access, complete macOS authorization and wait for mounting to finish.

03

Continue in Finder

Copy and edit files. Close files before using Safely Eject when you are finished.

A small app, right where you need it.

See your drives, enable writing and open Finder from the menu bar. Progress stays visible while the app works; reports are there when you need them.

Actual menu with a writable sample NTFS drive
Sample interface states; no disk was mounted to create these captures.

Install. Then enable writing.

Choose Homebrew or a manual download. Both use the same driver and macOS setup.

Homebrew

Install from our Homebrew tap. Keep it up to date with brew upgrade.

Homebrew
brew tap guoquan/mountfs https://github.com/guoquan/mountfs
brew install --cask guoquan/mountfs/mountfs
brew install gromgit/fuse/ntfs-3g-mac

Homebrew installation guide ↗

Manual download

Download the latest development build from GitHub Releases. These builds are ad-hoc signed and not Apple-notarized.

  1. Open the latest Release and choose the app ZIP under Assets for your Mac architecture (arm64 means Apple Silicon).
  2. Download without signing in to GitHub. Extract the application ZIP once; SHA256SUMS.txt contains its checksum.
  3. Quit the old app if updating, then place mouNTFS.app in Applications. Open it and connect your drive.
Browse Releases ↗

With Homebrew installed, run these two commands:

brew install --cask macfuse
brew install gromgit/fuse/ntfs-3g-mac

Finish macOS setup

Follow the macFUSE setup guide for approval and restart requirements. The default kernel backend may require a startup security change on Apple Silicon.

Apple Silicon · macOS 13+ · Ad-hoc signed development build, not Apple-notarized. macOS may block first launch.

macFUSE setup guide ↗Full installation guide ↗

Device access denied? Check Full Disk Access for the actual ntfs-3g executable. Administrator authorization is a separate permission. The usage guide covers both.

Before you plug in.

A few things worth knowing before your first write.

Usage & troubleshooting ↗
Will it format my drive?

No. mouNTFS enables writing to an existing external NTFS partition. It does not format drives. A damaged or hibernated volume may need attention in Windows before writing can be enabled.

Does it enable writing automatically?

No. Connecting a drive updates the list; you choose when to enable writing. macOS may request administrator authorization during an operation. The app does not save your password.

Can I use any Mac or NTFS drive?

The app requires macOS 13+ and compatible drivers. Ordinary mounting has limited user-reported success on Apple Silicon; broader hardware and driver combinations still need testing. Only external NTFS partitions are mount targets.

What if it does not work?

Open Diagnostics for the operation log and read-only disk scan. Check the usage guide for driver compatibility, permissions and busy drives. Do not format a drive just because an operation failed.

Built with AI.
Shaped by humans.

Human–AI collaboration

An experiment in making a useful little tool together. AI writes the code; humans lead the design, review, testing and direction. From a shell script to a native Mac app, the project keeps growing with real-world feedback.

Finding mouNTFS useful? Give it a star.

A GitHub Star helps others find the project. Share it with a friend who needs to write to NTFS on a Mac.

Star on GitHub ↗
Help shape the next step ↗Support the project ↗