: And the most important lesson of all? The adapter often wouldn't even show up in the Device Manager unless a physical Ethernet cable was plugged in first, completing the circuit of life.
JP1082 No 030818 appears to use a Realtek RTL8153-class chipset. For reliable gigabit performance, use the Realtek-provided drivers (Windows/Linux) or a vendor-supplied signed macOS driver for macOS systems. Without these drivers, expect limited speed and instability. jp1082 no 030818 usb lan driver verified