Problem with El Capitan upgrade

Have you tried the following steps?

1. Before opening the Mail app, turn off your wifi connection (prevents mail from trying to download mailboxes from all accounts at once).

2. Launch Mail app and go to Mail -> Preference -> Accounts tab.

3. Click each of your accounts on the left side of the Accounts window, then uncheck the box next to "Enable this account." Disable all of your mail accounts.

4. Close Preference and close the Mail app.

5. Relaunch the mail app and reconnect to wifi.

6. Go back to Mail -> Preferences -> Accounts tab, and enable the first account. Give the app plenty of time to download all messages until you no longer see "Checking for Mail..." at the bottom left of the app screen (may take a few minutes depending on how many messages you have on the server).

7. Once the app is no longer "Checking for Mail..." repeat this server for each of your other accounts.

Have you tried creating a new user account and test the app again?

Try to create a new user account on your computer and try the application again. You can do that like this:

1. Choose Apple menu > System Preferences, and then click Users & Groups.
2. Click the lock icon to unlock it, and type an administrator name and password.
3. Click Add ➕ below the list of users.
4. Choose the type of user from the New Account pop-up menu.

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. Initially the words "String Matching" are shown in that box. 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.

I don't see how it will solve my problem

It won't solve your problem. I'm asking for information that might (or might not) lead to a solution. I'm afraid I have neither the time nor the inclination to try to persuade you to let me help. So I suggest instead that you click the Support link at the top of this page to schedule a support call from Apple, or else make a "Genius" appointment at an Apple Store. Good luck.

I upgraded to El Capitan and it messed up almost all my programs. I lost my address book with contact grouping. It won't do internal links and photos is completely wrong. So sorry I upgraded and I'm on phone with Apple for hours now. Still now working.