Parth How to 20/10/2020 1 min readWhat is the default program on macOS that handles mail Table of Contents ToggleOpen the ‘Mail’ app on your macOS device.Immediately, you will see a window showing you all the email clients supported by the app.Select the client of your choice.Log in to your client using the username and password. Immediately, you will see a window showing you all the email clients supported by the app. Select the client of your choice.