Review on TP-Link AC1900 USB WiFi Adapter (Archer T9UH) - Dual Band Wireless Network Dongle for Desktop with High Gain Antennas, Supports Windows 10/8.1/8/7, Mac OS by Bogdan Nikolov ᠌

There are two types of drivers for poppy - an unofficial package on github and official ones. So only the latest version of the official ones works fine. The rest is not even worth trying - there are problems with signal stability. Pros: Runs on Mac OS X High Sierra Decent latency - you can safely play shooters on 2GHz wifi With its cons: By default, the Mac does not see it without drivers. Sometimes it loses a 5GHz point, but this is more likely a problem in the router