Try plugging the adapter into a different USB port, preferably a USB 2.0 port if it's an older 802.11n model, as some older adapters struggle with USB 3.0 power management Slow Speeds:
If your Zotex adapter drops connections, fails to start, or shows slow speeds, walk through these troubleshooting steps. Device Disconnects Frequently zotex usb wifi driver
Download the macOS compatible driver dmg package from the chipset manufacturer. Double-click the .dmg file and run the installer pkg. Try plugging the adapter into a different USB
Move the dongle from a front-facing case port directly to the motherboard ports on the back of your desktop PC. Ensure you use a blue USB 3.0 port if your device supports dual-band speeds. "Device Cannot Start (Code 10)" Error fails to start