You didn't provide much detail, so bear with me for awhile. There are a number of possibilities.
It may not seem intuitive. First of all, are you able to login to your alternate email, you needed one to setup Gmail? The reason I am asking this is that the first thing to check is that your password is not correct. Remember that Gmail's password is case sensitive, so double check that you have entered it correctly.
Next are you able to read/send/delete/archive your Gmail from a browser? To troubleshoot this, if you don't have the Chrome browser, get it. In the Chrome browser, at the initial screen, click on skip for now. Then go to https://www.gmail.com.
Are you able to login to Gmail? If you can login to Gmail from the Chrome browser. If your password is incorrect, and you don't remember it, you may request it to be reset and the new temporary password will be sent to your alternate email, so you'll need do access that account to read your password and the instructions to using it.
Once your password is correct, or you are able to get in to Gmail in Chrome, you'll need to confirm a couple of settings in Gmail. Click on the gear, and select Settings
. Along the top you'll see several settings, select Forwarding and POP/IMAP
. Next, ensure that POP is disabled and IMAP is enabled. If that is not the current setting, change it. Click on Disable POP
and click on Enable IMAP
. After making those changes, you MUST click on the Save Changes
button. If you miss that step, it won't change.
Mac OS X Mail App
Now everything is setup correctly in Gmail. The next is in the Mac OS X Mail app. In the Mail app, select the Mail
menu item and go to Preferences...
then select Gmail or whatever you called it. There will be three tabs shown. Select Account Information
. Then in there, make sure that your Email Address
is your fully qualified Gmail address, meaning <user id>@gmail.com
. Then, go down and make sure that the Incoming Mail Server
is set to imap.gmail.com
. Then the Outgoing Mail Server (SMTP)
is set to Gmail
. TLS Certificate
should be set to None
Now go to the Advanced
tab. Then make sure all the top half check boxes are checked except make that the Send large attachments with Mail Drop
not selected. Leave the IMAP Path Prefix
blank. Then make sure that Port
is set to 993
and that Use SSL
is checked. Also that Allow insecure authentication
is NOT checked. Check the Use IDLE command if server supports it
Now close that Accounts pane and close and restart Mail. It should already connect and be on-line, but just to be sure, restart Mail. This should solve any setting issues. Let me know if you are able to login via the Web Gmail, via the Chrome browser but it still shows as off line in Mail.