The exact way to use Gmail on Mac and for that-
• First of all, open the Mail app on the Mac device
• Choose Google and click on Continue on the screen that says Choose a Mail account
• After that, choose open Browser to allow Google to complete authentication
• Enter the email address and click on Next and enter the password and click on Next
These are the exact way to use Gmail on Mac and if stuck with any error then, Contact for Gmail Help UK for instant and reliable assistance.