For Linux (Ubuntu/Debian), the kernel includes native drivers (cdc_acm, ftdi_sio). Plug and play usually works. For macOS, FTDI and CH340 have dedicated .pkg installers, but Apple Silicon (M1/M2) may require Rosetta 2 for older installers.

You can generally find the necessary drivers through the following methods:

| Error Message / Symptom | Most Likely Cause | Solution | |---|---|---| | “Device descriptor request failed” | Bad USB cable or USB port | Try a different cable, different USB port (avoid hubs). | | Yellow exclamation in Device Manager (Code 10) | Conflicting or wrong driver | Uninstall driver, reboot, reinstall correct chipset driver. | | Prolific device shows “PL2303HXA” with error 10 | Counterfeit chip + new driver | Uninstall v3.8+ driver. Install v3.3.2.105 (Google for archive). | | Device appears in Device Manager but no COM port | Driver installed as generic USB device | Right-click device → Update driver → Browse → Let me pick → Choose “USB Serial Port.” | | Works on Windows 7 but not Windows 11 | Driver not WHQL certified for 11 | Use FTDI or Silicon Labs device instead of Prolific. | | The AWM interface is not detected at all | Power delivery issue or dead device | Check device on another PC. If not seen anywhere, interface may be dead. |

Some legacy AWM USB 1.1 interfaces have poor shielding for USB 3.0 ports. Use a USB 2.0 hub between your device and the USB 3.0 port.

If your device is recognized as a "USB Serial Port" or "AWM USB Interface," visit the FTDI Chip Drivers page . You will likely need the VCP (Virtual COM Port) drivers.