I'm using Clancey.SimpleAuth to log into Google's cloud and Google's API issues a RedirectUri back to the client to provide the Access Token. What I've implemented works on 10.13 and 10.14, but not 10.11 nor 10.12. The AppDelegate.OpenUrls() is not getting invoked on those 2 older OSs. Instead, I get a popup saying...
"There is no application set to open the URL..."
Anybody know what I need to do to get this working?