These instructions are a mix of what I got from:
https://blog.alfa.com.tw/2016/03/01/using-alfa-network-awus036nh-awus036neh-awus036nf-awus051nh-v2-awus052nh-on-osx-10-11-el-capitan/
https://www.bearifi.com/pages/bearextender-1200-support