Once you are in the tab, you’ll be able to edit an existing signature or create a new one. You will see the ‘Signatures’ tab across the top, click it. Open the Mac Mail app and go to ‘Mail’ then ‘Preferences’ To create your email signature to your Mac Mail, and also add a logo, you just need to follow these simple instructions: If you’re running your business on the go then of course you’ll want to add an extra professional element to your communications.Īdding a digital signature to your email is a simple process if you have a Mac Mail. The Macbook is the laptop that many professional around the world choose to use.