Make sure you’ve quit all Chrome windows. You can right-click on Chrome from the Dock and select
Quit or you can hit
Cmd + q whilst Chrome is open. Then run the below from your terminal:
open -n -a Google\ Chrome --args --disable-web-security --user-data-dir="/tmp"
Useful if you want to avoid CORS errors during development.
P.S. If you’re dealing with CORS issues, my sympathies.