As of today, all our Process tests use RemoteExecutor which is simply not supported on MACCATALYST:

https://github.com/dotnet/dotnet/blob/1948989e277a41b84849a83c57f0637d685b0f09/src/arcade/src/Microsoft.DotNet.RemoteExecutor/src/RemoteExecutor.cs#L110-L118

We need to provide MACCATALYST tests that would ideally work on iOS as well (run some simple Unix tools available for both emulators?).

It would help us to ensure bugs like #126299 are not coming back during my upcoming Process work.

#126099 can be used as a reference implementation where we have added the Android tests just few days ago