Thunderbird will read your OS X address book and display it in the Thunderbird address book window! From the menu bar, open the Window menu and click on Address Book. Your imported messages will appear in the Local Folders account, in a folder called ' Apple Mail Import'.
You will see a log of successfully imported folders, then click Finish to close the import wizard.On the menu bar, open the Tools menu and click on Import.(Currently, message and address book import is only functional with Apple Mail 5.0 or earlier.)
Thunderbird can import your messages and OS X address book, but it cannot import your account settings.
