If the device appears in Device Manager under "Other devices" with a yellow warning triangle, the driver was not installed automatically.
Modern versions of macOS and Linux distributions typically have the FTDI drivers compiled into the kernel. ft231x usb uart driver link
Always download drivers from the official FTDI website to avoid malware or broken drivers. If the device appears in Device Manager under
| Operating System | Official Driver Package | Direct Download Link (FTDI) |
| :--- | :--- | :--- |
| Windows (11, 10, 8.1, 7) | FTDI CDM (Composite D2XX + VCP) | Click here for Windows Setup |
| macOS (11+ / Big Sur & newer) | D2XX Direct (with VCP support) | Click here for macOS |
| Linux (Kernel 2.6+) | Built-in VCP driver (No install needed) | sudo modprobe ftdi_sio (see notes below) | Always download drivers from the official FTDI website
Note: The primary driver package for Windows is the "CDM" (Combined D2XX and VCP). It makes the FT231X appear as a standard COM port (e.g., COM3).