Where to download Unity Hub v2?

The following bash script seems not working with Unity Hub 3.0 in Mac OSX.

     System.Diagnostics.ProcessStartInfo startInfo = new System.Diagnostics.ProcessStartInfo();
     startInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
 
     startInfo.FileName = "/bin/bash";
     startInfo.Arguments = "-c \"p4 change counter\"";
 
     startInfo.WorkingDirectory = Application.dataPath;
     startInfo.RedirectStandardOutput = true;
     startInfo.UseShellExecute = false;
 
     System.Diagnostics.Process process = new System.Diagnostics.Process();
     process.StartInfo = startInfo;
     process.Start();

It says "p4 command not found". I suspect the new Unity Hub starts Unity Editor without the local bash profile.

I need to download Unity Hub 2.x.x to make it work again.