Part 1: Change e-mail password
Part 2: Configuring MacMail
Step 1: In Mail, click Mail -> Preferences -> and hit the “+” sign on the bottom left of the Preferences window.
Step 3: Under Account Type, select IMAP. For description, type in your email address. Under Incoming Mail Server, enter in “imap.gmail.com.” For user name, type in your full email adress and then type in your password after. Hit Continue.
Step 4: Under description, type in your email address. Under Outgoing Mail Server, enter “smtp.gmail.com.” Make sure that the “Use only this server” box is checked. Next, make sure that the “Use Authentication” box is checked, and then type in your full email address next to User Name, and then your password. Hit Continue.