I successfully used Xamarin in VS2015 with macOs ElCaptain.
Recently I have updated Xamarin to 184.108.40.2066. It requires XCode 8.3, so I was forced to update macOs to Sierra. Now I have Sierra 10.12.5, XCode 8.3 and all Xamarin components updated both on Windows and macOs.
But after all updates I cannot connect to Xamarin Mac Agent. Output messages aren't very informative:
Starting connection to Mac 192.168.206.129...
Starting Broker 220.127.116.116 in port 50156...
Couldn't connect to 192.168.206.129. Please try again.
Disconnected from the Mac 192.168.206.129 (192.168.206.129)
Please give me any ideas how to fix it. Are any new demands to work with Sierra?