Awesome Open Source
Awesome Open Source

OpenMTP | Android File Transfer for macOS


Advanced Android File Transfer Application for macOS.

Transferring files between macOS and Android or any other MTP devices has always been a nightmare. There are a few File Transfer MTP apps which are available online but most of them are either too expensive or come with bad UI/UX. The official "Android File Transfer" app for macOS from Google comes with bugs, innumerable limitations, some of which include - not being able to transfer files larger than 4GB, frequent disconnections, unable to rename the folders or files on the android/MTP devices. Most of the other apps available online uses either WiFi or ADB protocol to transfer the files, which is an extremely time-consuming process.

Countless searches to find an app to solve these problems and failing to find one made me restless. So, I took the leap and decided to create an app for us that could help us have a smooth and hassle-free file transfer process from macOS to Android/MTP devices. Created with the objective of giving back to the community, we can all use this app for free in this lifetime.


  • Safe, Transparent and Open-Source
  • Plug and Play via USB. No hassles, easy and instant connection.
  • Select between Internal Memory and SD Card
  • Transfer multiple files which are larger than 4GB
  • Dark mode
  • Drag-and-drop support
  • Split pane views for both Local Computer and Android device
  • Choose between Grid and List view.
  • Use Keyboard Shortcuts to navigate through your files.
  • No collection of personally identifiable information.

Kalam Kernel

OpenMTP 3.0 features a new MTP kernel and it was written from the scratch. It promises a file copy speed of 30 to 40 MB/s on low and mid range devices and 100 to 120 MB/s on higher end devices. The all new and powerful MTP kernel is named after Dr. A. P. J. Abdul Kalam

Do checkout the Go package which I've written to build Kalam Kernel: Feel free to raise PRs.


  # newer versions:
  brew install openmtp --cask
  # older versions:
  brew cask install openmtp


OpenMTP File Explorer

OpenMTP File Transfer

Keyboard Shortcuts

Command Keyboard Shortcut
Delete backspace
New Folder command (⌘)+n
Copy command (⌘)+c
Copy to Queue command (⌘)+shift+c
Paste command (⌘)+v
Refresh command (⌘) +r
Folder Up command (⌘)+b
Select All command (⌘)+a
Rename command (⌘)+d
Switch Tab command(⌘)+1
Open enter
Navigate Left left
Navigate Right right
Navigate Up up
Navigate Down down
Select Multiple Items Forward (in Grid View) shift+left
Select Multiple Items Backward (in Grid View) shift+right
Select Multiple Items Forward (in List View) shift+up
Select Multiple Items Backward (in List View) shift+down
Select Multiple Items (with mouse) command (⌘)+click or shift+click

Building from Source

Requirements: Node.js v10, Git and Yarn package manager


$ git clone --depth 1 --single-branch --branch master

$ cd openmtp
$ yarn


A fresh clone might throw undefined state error. Run the following commands once to fix the issue.

# For Mac and Linux
$ UPGRADE_EXTENSIONS=1 npm run dev

# For Windows
$ set UPGRADE_EXTENSIONS=1 && npm run dev
# Development
$ yarn dev

# Pre-production
$ yarn start


Setup the code signing to build, package and publish the app.

App Notarization for macOS (skip this section for non macOS builds)

  • Rename sample.env file as .env
  • Update APPLEID in .env file
  • Log into your Apple Account
  • Goto Security > App-Specific Passwords
  • Click on Generate Password..., enter a password label and click Create
  • Copy the displayed app-specific-password
  • Run
security add-generic-password -a "<apple-developer-account-username>" -w <app-specific-password*> -s "ELECTRON_NOTORIZE_PASSWORD"


npm install -g @sentry/wizard
sentry-wizard --integration electron

# Upload Debug Information
# Everytime the electron.js version is upgraded run:
node sentry-symbols.js

sentry-cli login

Packaging Instructions:

$ export GH_TOKEN="<github token>"
# For local platform
$ yarn package

# For multiple platforms
$ yarn package-all

Technical Features

  • Built using Electron v11 and React v17
  • Loadables, Dynamic Reducer Injection, Selectors for code splitting and performance optimization
  • Hot module reload (HMR) for instant feedback
  • Inbuilt error logging and profile/settings management
  • Industry standard state management
  • JSS, SASS/SCSS styling
  • Port assigned: 4642


  • config/env/ and config/env/ contain the PORT number of the app.
  • config/dev-app-update.yml file holds the GitHub repo variables required by electron-updater.
  • config/google-analytics-key.js file contains the Google Analytics Tracking ID.
  • package.json build.publish object holds the values for publishing the packaged application.
  • app/constants folder contains all the constants required by the app.


Debugging Guide

Dispatching redux actions from the main process

VM112:2 Uncaught TypeError: Cannot read property 'state' of undefined error

# For Mac and Linux
$ UPGRADE_EXTENSIONS=1 npm run dev

# For Windows
$ set UPGRADE_EXTENSIONS=1 && npm run dev


Your device is not recognized

The app goes blank while trying to connect a Samsung device

Notarizing Electron apps throws - “You must first sign the relevant contracts online. (1048)” error

More repos



If you are interested in fixing issues and contributing directly to the code base, please see the guidelines.

Support OpenMTP

Help me keep the app FREE and open for all.


Please feel free to contact me at [email protected]


OpenMTP | Android File Transfer for macOS is released under MIT License.

Copyright © 2018-Present Ganesh Rathinavel

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