Do not use random "driver updater" websites. Get drivers from trusted sources:

| OS | Driver source | Notes | |----|--------------|-------| | Windows | DriverGuide (direct DM9601) or OEM driver | Also works: Plugable’s DM9601 driver archive | | Linux | Built-in | Load module: sudo modprobe dm9601 | | macOS | HoRNDIS (old) or generic USB Ethernet kext | Not recommended for macOS 10.15+ |

✅ Safest Windows driver source:
Search for "DM9601 Windows 10 driver" and use files from Plugable or StarTech support pages — they provide signed drivers for this chipset.

The most common reason users search for VID_0FE6&PID_9900 is driver failure. When you plug the device in, Windows may show "Device descriptor request failed," a yellow exclamation mark in Device Manager, or simply fail to recognize it as a network adapter.

Because this VID/PID is widely cloned, the device may not be what it claims. Avoid using untrusted USB Ethernet adapters with this identifier in secure environments unless you have validated the chipset via physical inspection or advanced USB descriptors.

Apple does not include a native driver for this chip. Third-party options exist but are increasingly unreliable on modern macOS versions (Ventura, Sonoma, Sequoia).

If you have the driver installed but the adapter still fails, consider the following: