WCH USB serial driver for CH340/CH341/CH342/CH343/CH344/CH9101/CH9102/CH9103/CH9143

The driver provides support for a range of USB‑to‑serial converter chips, including the CH340, CH341, CH342, CH343, CH344, CH9101, CH9102, CH9103 and CH9143 families. It enables macOS systems to recognize these devices as serial ports, allowing applications that communicate over UART to transmit and receive data through the USB interface. The software is packaged as a core component for macOS, offering the necessary kernel extensions and user‑space utilities to establish the virtual COM ports.

Developers and engineers who integrate Qinheng’s USB serial chips into hardware projects can use the driver to test, debug, and operate their firmware or peripheral communication without additional hardware adapters. It is also useful for hobbyists and makers who employ development boards or modules based on these chips and need reliable serial connectivity on macOS.

The project is maintained by Nanjing Qinheng Microelectronics, a semiconductor design firm that creates integrated chips for connectivity, networking, and control applications. The driver is marked as stable, indicating that it has undergone sufficient testing for regular use on supported macOS versions.