How to Completely remove Gmail account

Is there a Gmail account listed in System Preferences>Mail, Contacts & Calendars that needs deleting?

If you've done this, ignore me. Not sure if this is a a help or not, but when setting up the new gmail account are you letting Mail do it automatically?

If so, have you tried setting up the account manually, which gives more control over the setup process, although you'll need to input the server address info yourself? At the first setup screen, where you input your email address/password, hold down the Alt (Option) key as your press 'continue' which takes you into the manual configuration process.

Mail/Preferences/Accounts - in the outgoing server box in the email account if you have two arrows at the right end, click on the server shown and select edit list. Delete the old one.

You might also want to delete any gmail entries from your Keychain before setting up the new account (Utilities>Keychain Access).

Copy the line below.

~/Library/Containers/com.apple.mail

While holding down the option key, select Go/Go To Folder from the Finder menu bar. Paste the line into the window. You won’t see it.

See if you can find any remenants there.

If that doesn't solve the problem, quit Mail.

Take notes of all account information or take screen shots. You may need to set the accounts up again. Quit Mail.

Copy the line below.

~/Library/Containers/com.apple.mail

While holding down the option key, select Go/Go To Folder from the Finder menu bar. Paste the line into the window. You won’t see it.

Move the folder com.apple.mail to your desktop. You must move the entire folder, not just the contents.

Relaunch Mail and test. If the problem is solved, recreate any required Mail settings and import any emails you want to save from the folder on the desktop.

Delete the folder on the desktop. If the problem remains, return the folder to where you got it replacing the one that is there.

Information learned from Linc Davis.

If you prefer to make your user library permanently visible, use the Terminal command found below.

http://osxdaily.com/2011/07/04/show-library-directory-in-mac-os-x-lion/

You might want to bookmark the command. I had to use it again after I installed 10.8.2. I have also been informed that if you drag the user library to Finder it will remain visible.