after i upgrade to ox x yosemite the mail app not working

Launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Step 1

For this step, the title of the Console window should be All Messages. If it isn't, select

SYSTEM LOG QUERIES ▹ All Messages

from the log list on the left. If you don't see that list, select

View ▹ Show Log List

from the menu bar at the top of the screen.

In the top right corner of the Console window, there's a search box labeled Filter. Enter the name of the crashed application or process. For example, if Safari crashed, you would enter "Safari" (without the quotes.)

Each message in the log begins with the date and time when it was entered. Select the messages from the time of the last crash, if any. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.

The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.

Please don't indiscriminately dump thousands of lines from the log into this discussion.

Please don't post screenshots of log messages—post the text.

Some private information, such as your name, may appear in the log. Anonymize before posting.

Step 2

In the Console window, select

DIAGNOSTIC AND USAGE INFORMATION ▹ User Diagnostic Reports

(not Diagnostic and Usage Messages) from the log list on the left. There is a disclosure triangle to the left of the list item. If the triangle is pointing to the right, click it so that it points down. You'll see a list of crash reports. The name of each report starts with the name of the process, and ends with ".crash". Select the most recent report related to the process in question. The contents of the report will appear on the right. Use copy and paste to post the entire contents—the text, not a screenshot.

I know the report is long, maybe several hundred lines. Please post all of it anyway.

If you don't see any reports listed, but you know there was a crash, you may have chosen Diagnostic and Usage Messages from the log list. Choose DIAGNOSTIC AND USAGE INFORMATION instead.

In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.)

Please don’t post other kinds of diagnostic report—they're very long and rarely helpful.

When you post the log extract or the crash report, you might see an error message on the web page: "You have included content in your post that is not permitted," or "The message contains invalid characters." That's a bug in the forum software. Please post the text on Pastebin, then post a link here to the page you created.

Back up all data before proceeding.

Step 1

If Mail crashes or freezes immediately on launch, try the steps suggested on this page. Sometimes a corrupt message on a mail server can be deleted by logging in to the server through its web page. If Mail still won't launch, skip to Step 3.

Step 2

There are three types of mail account: IMAP, Exchange, and POP. You can determine the type of each account by opening the Mail preferences window, selecting the Accounts tab, and then selecting Account Information.

Select all POP mailboxes, if any, and then select

Mailbox ▹ Export Mailbox...

from the Mail menu bar. Export the POP mailboxes to the Desktop folder.

If you have IMAP or Exchange accounts, and you don't store sent, deleted, and junk messages on the server, export those mailboxes the same way. You can determine whether the messages are on the server by selecting Mailbox Behaviors in the Accounts tab.

Also export all mailboxes in the On My Mac category.

You don't have to export the other mailboxes, because the messages are stored on the servers.

Quit Mail.

Step 3

In System Preferences, open Internet Accounts (OS X 10.9 or later) or Mail, Contacts & Calendars (OS X 10.7 or 10.8). Make notes of the settings for each mail account (all types), then delete the accounts.

Step 4

In the Finder, hold down the option key and select

Go ▹ Library

from the menu bar. Move the following items (some may not exist) from the folder that opens to the Desktop:

Application Support/AddressBook/MailRecents-v4.abcdmr

Containers/com.apple.corerecents.recentsd

Containers/com.apple.mail

Containers/com.apple.MailServiceAgent

Mail

Note: you are not moving the Mail application. You’re moving a folder named “Mail.”

Step 5

Launch Mail. It will behave as if you were setting it up for the first time. Go through the setup process with one account, using the information from Step 3. Test. If Mail works now, recreate the rest of the accounts (if you have more than one) and other settings.

Any custom stationery that you created may be lost. Ask for instructions if you want to preserve that data.

If there’s no improvement, quit Mail and put back the items you moved to the Desktop, replacing any newer ones that may have been created in their place. Stop here and post your results.

Step 6

If you took Step 2, import the mailboxes you exported:

File ▹ Import Mailbox...

Select Apple Mail as the data type. Typically, the process takes a few minutes, but it may take hours if you have gigantic mailboxes. In that case, you may be able to speed things up by temporarily adding your home folder to the Privacy list in the Spotlight preference pane. Remove it when Mail has finished importing.

The mailboxes that you didn't export in Step 1 should synchronize automatically with the server. Again, if the mailboxes are very large, downloading them may take quite some time, and network performance will be slower than usual during that time.

If you skipped Step 2, look inside the Mail folder on the Desktop for a subfolder Mail/V2/Mailboxes. Import the mailboxes it contains.

Test. If Mail is still working, delete the items you moved to the Desktop in Step 4.