Open your desired your Internet Browser (Safari, FireFox, Google Chrome, etc).
Go to www.gmail.com and sign into your account.
Exit out of the Internet Browser.
Open the APPLE MAIL APPLICATION . -The mail icon will be on your desktop. This looks like a postage stamp with an eagle on it. -If ...
Check all information is correct and click CONTINUE.
Exit out of ACCOUNTS and PREFERENCES windows and return to the APPLE MAIL APPLICATION.
Close PREFERENCES WINDOW and return to the APPLE MAIL application.
Return to PREFERENCES.