You simply select your email client and email account, then enter your unique signature key or insert your custom HTML code and the installer app will install your email signature into your desired email client for you. Installing your email signature with our app takes just seconds. By using the signature installer app, you will be able to correctly install your email signature in Outlook for Mac 2016, resolving the installation issue that is currently experienced with other methods of installation. We've spent the past few months developing a signature installer app for macOS which works with all of the major email clients including Outlook for Mac 2016.