Prolific USB to Serial Cable driver

The driver enables macOS systems to communicate with devices that use the Prolific PL2303 USB‑to‑serial bridge chip. It implements the virtual COM port (VCP) interface, allowing applications to access UART, RS232, RS485, and related serial protocols through a standard USB connection. The driver supports a range of PL2303 variants, including GT, GR, GE, GC, GS, GL, GD, and related HID‑based chips, handling data rates up to 12 Mbps for UART and up to 10 Mbps for RS485.

It is intended for developers and end‑users who need to integrate USB‑serial adapters into macOS environments, such as in industrial control, networking, medical equipment, home appliances, and smart agriculture applications. The package includes a signed macOS kernel extension and user‑space utilities that expose the serial ports as /dev/cu.* devices, compatible with typical terminal programs and serial libraries.

The driver is distributed by a global IC design company that also provides hardware solutions for USB‑to‑UART, SPI, and I²C connections. It is released as a stable, core component for macOS, with versioned releases and support for the latest operating system builds.