Have a look at this report: https://developercommunity.visualstudio.com/t/Error-trying-to-pair-Visual-Studio-1712/10806194?space=62&ftype=problem&preview2=true&q=fma

I would encourage you to try a couple of things in order to see if there’s any progress. First, install the latest VS stable version, then do the steps below:

1 - Look for other zombie Broker processes running on your Mac. To do so, run the follwing on a terminal in your Mac (ensure to not have any active connection in VS already): ps -A | grep XMA. If you see any result, kill the processes by running kill -9 , where is the process id that the first command shown

2 - Restart your Mac (just in case your current session is in a weird state)

3 - Try to start the broker manually. This is just a test in your Mac that doens’t affect VS. Go to /Users//Library/Caches/Xamarin/XMA/Agents/Broker/, where is your Mac user (the same you use in Pair To Mac) and is the version of the Broker. In case you have more than one version folder, use the latest by “Date Modified”. Then open a terminal in the Mac pointing to that folder and run: dotnet Broker.dll -port=45555

This led me to find that the broker service needed .NET 8.0 which was not installed.