Improve support & documentation for UI testing on a mac about uno.uitest

[jeromelaban]

Thanks for the report. Can you indicate what's not working ? Which error messages ? Sometimes it's about updating Xamarin.UITest.

[mrlacey]

I was getting a Calabash.XDB.Exceptions.DeviceAgentException and then an NSInternalConsistencyException

I assumed that it was related to Xamarin.UITest but because of dependency compatibility issues, I couldn't update that on its own.

In the end, I gave up and updated everything: OSX, XCode, VS4Mac, Xamarin workloads, and all the NuGet packages and managed to get it working again.

I thought I had turned off every automatic update setting on my machines to avoid the situation where something changes unexpectedly and then something I rely on stops working. I guess this just needs to be yet another area where I have to assume I must keep updating to the latest version of everything to keep using it.

[jeromelaban]

That's correct. Unfortunately, xCode updates tend to break stuff very regularly. My assumption is that the Xamarin.UITest team will make an update that will fix this.