In mail on the left hand side of the window under mailboxes, I have all of my different email accounts then I have a line that says "ON MY MAC" Under it is a folder that says import, and then in the import folder I have a folder that I imported.
The question I have is this "ON MY MAC" is duplicated. So I have 2 on my macs???
I got this to work on my second try. I had to move the duplicate 'On My Mac" all the way to the top of the panel above the "inbox" before it actually worked.
Didn't work for me. But, I worked with a tech, Amber, at Apple and have an alternate resolution.
-Close all apps
-Move the mail folder at: users/"home folder"/library/Mail to the destop
-delete the com.apple.mail.plist from: users/"home folder"/library/preferences
-Logout and log back in
-Go to sys preferences and select .Mac; click on signout and delete the username from the login box; leave this pane open at that spot
-Open Apple Mail; you should be asked to go through the setup steps. Setup your email account(s)
-Go to file, import, mailboxes, select "Mail for OS X" and navigate to the Mail folder you moved to your desktop.
-Select "Mail" from that folder and select choose.