OpenMTP is an advanced Android file transfer application for macOS that enables direct USB-based file exchange with Android and MTP devices.
The tool addresses the limitations of existing solutions, particularly Google's official Android File Transfer app, which suffers from a 4GB file size cap, frequent disconnections, and inability to rename files or folders on Android devices. Most alternatives rely on WiFi or ADB protocols, which are slow and cumbersome. OpenMTP uses a custom MTP kernel called Kalam, written from scratch, to provide direct USB connectivity with transfer speeds of 30 to 40 MB/s on mid-range devices and 100 to 120 MB/s on higher-end devices. The application supports selecting between internal storage and SD cards, handles files larger than 4GB, and includes features like drag-and-drop, split pane views, grid and list view options, keyboard shortcuts, and dark mode.
Developers and users on macOS Big Sur or later should consider this tool if they need reliable, fast file transfers to Android devices without the frustrations of the official Google app or the slowness of WiFi-based alternatives. The project is open source, collects no personal information, and is free to use. Those running older macOS versions can fall back to a legacy MTP mode, though they will not receive kernel updates with new device support.
The project maintains active development with regular updates to the Kalam kernel for the latest three macOS versions, ensuring compatibility with new devices and stability improvements. The maintainer has also published the underlying Go package used to build the kernel as a separate open-source project, inviting community contributions.
