It's a premium software solution for word processing and it's especially capable when working with multiple languages. However, if you're looking for something more powerful and especially if you want to combine the Hindi and Urdu scripts in a single document, Nisus Writer Pro is my option of choice.
You can also use the in-built TextEdit and/or Apple Pages to create documents in Hindi and these programs will allow you to format your text however you'd like. This means that you can freely switch into Hindi as you're composing an email in Mail, you could make a Hindi note in Stickies, Notes, or Reminders, or type in Hindi within any input field when you're surfing the web.
All of the built-in programs within your operating system (macOS) will support typing in Hindi.
