Cómo usar el Proceso.Start () o equivalente con Mono en un Mac y pasar argumentos

Estoy tratando de escribir algún código c # para iniciar un navegador usando Process.Start(app,args); donde apps es la ruta al navegador, por ejemplo, /Applications/Google Chrome.app/Contents/MacOS/Google Chrome y los args son --no-default-browser-check

Si lo hago, que funciona en Windows y en Linux

Process.Start("/Applications/Google Chrome.app/Contents/MacOS/Google Chrome","--no-first-run");

Consigo

open: unrecognized option `--no-first-run'
Usage: open [-e] [-t] [-f] [-W] [-n] [-g] [-h] [-b <bundle identifier>] [-a <application>] [filenames]
Help: Open opens files from a shell.
      By default, opens each file using the default application for that file.  
      If the file is in the form of a URL, the file will be opened as a URL.
Options: 
      -a                Opens with the specified application.
      -b                Opens with the specified application bundle identifier.
      -e                Opens with TextEdit.
      -t                Opens with default text editor.
      -f                Reads input from standard input and opens with TextEdit.
      -W, --wait-apps   Blocks until the used applications are closed (even if they were already running).
      -n, --new         Open a new instance of the application even if one is already running.
      -g, --background  Does not bring the application to the foreground.
      -h, --header      Searches header file locations for headers matching the given filenames, and opens them.

También he intentado Monobjc para intentar ejecutar el código con

// spin up the objective-c runtime
ObjectiveCRuntime.LoadFramework("Cocoa");
ObjectiveCRuntime.Initialize();
NSAutoreleasePool pool = new NSAutoreleasePool();

// Create our process
NSTask task = new NSTask();
NSPipe standardOut = new NSPipe();
task.StandardOutput = standardOut;
task.LaunchPath = @"/Applications/Google Chrome.app/Contents/MacOS/Google Chrome";

// add some arguments
NSString argumentString = new NSString("--no-first-run");
NSArray arguments = NSArray.ArrayWithObject(argumentString);
task.Arguments = arguments;

// We should have liftoff
task.Launch();


// Parse the output and display it to the console
NSData output = standardOut.FileHandleForReading.ReadDataToEndOfFile;
NSString outString = new NSString(output,NSStringEncoding.NSUTF8StringEncoding);
Console.WriteLine(outString);

// Dipose our objects, gotta love reference counting
pool.Release();

Pero cuando corro mi código usando NUnit hace que NUnit explote.

Sospecho que esto es un error, pero no puedo probarlo. Agradezco cualquier ayuda!