Log into your chosen default Google account.Click on “Sign in” where your profile icon was shown. Open your browser of choice, head to, then click on your profile icon in the top-right section.Here’s how to change your default Google account that also changes your default Gmail on Windows or Mac PCs. Google also assigns the first login as the default, which is why you need to sign out of all accounts first. Google always opens new windows using your default account. This is because you access Google via a browser on all systems. Whether you are a Windows, Chromebook or a Mac user, you will be happy to know that things work the same all platforms. How to Change the Default Google Account on Windows, Mac, or Chromebook