Once you have the VID (Vendor ID) and PID (Product ID), you can identify the actual chip manufacturer. The "Netsys 9000WN" typically utilizes one of the following common chipsets:
Ralink / MediaTek (RT3070 / RT5370):
Atheros:
Fix:
The safest way to obtain the driver is from the manufacturer’s official source. Netsys often distributes drivers via CD (included in the retail box) or a direct download portal. netsys 9000wn driver download
Use a trusted driver repository:
Alternative: Use a Driver Update Tool
A: There is no official Netsys driver for macOS. However, open-source projects like chris1111/Wireless-USB-Adapter on GitHub support the RTL8812AU chipset for macOS Big Sur and later.