896      iPhone_iPad_Mac_apple

Apple Mail keeps crashing after Sierra 10.12.4....

I know the latest upgrade was supposed to fix the, but since the latest upgrade --- but not before --- my Apple Mail app keeps crashing after I try to send an email from my university's Exchange server. Again, didn't do it before the upgrade yesterday.

A diagnostic: It happens when I am sending an email FROM my account with the Exchange server. But if I have it sent via another account, like my gmail account, it is sent and does not crash the system. But again, this didn't happen before the upgrade to 10.12.4

Do a backup, preferably 2 on 2 separate drives.

Quit Mail.

Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J.  When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Go to Library/Containers/com.apple.mail.  Move the folder com.apple.mail to your desktop. You must move the entire folder, not just the contents.

Restart, re-launch Mail and test. If the problem is solved, recreate any required Mail settings and import any emails you want to save from the folder on the desktop. You can then put the folder in the Trash. If the problem remains, return the folder to where you got it replacing the one that is there. 

If that doesn’t solve it repeat the above using Containers/com.apple.MailServiceAgent.

Information learned from Linc Davis. Thanks to leonie for some information contained in this.

Mail crashing

Crashes/quits unexpectedly

A little more info would help -- do you get any error messages or just Mail crashing? What if you open the Activity and Connection Doctor window (click on Window menu and then Activity and Connection Doctor) before trying to send and look quickly when you click the Send button? You might try and use a camera or iPhone or iPad to take video of screen and see if there are any clues that show in either of these two special windows.

Do you have another account on the Mac that you could test to see if the same problem happens there? Might also try a safe reboot and then normal reboot and then try and run Mail again.

Good luck...

First I get a message the mail has closed. Then I restart Mail and get that box with all of my potential outgoing server accounts, telling me to pick another. If I pick my iCloud outgoing server, it won't send (doesn't crash it, but won't send). If I pick my gmail outgoing server, it does send and doesn't crash Mail.

When I run Connection Doctor, all accounts show up working.

Obviously it has something to do with the Exchange server's interaction with Mail that happened since the upgrade.

I'll try a safe reboot then a normal reboot as you suggest, and will get back.

Do a backup, preferably 2 on 2 separate drives.

Quit Mail.

Go to Finder and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J.  When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Go to Library/Containers/com.apple.mail.  Move the folder com.apple.mail to your desktop. You must move the entire folder, not just the contents.

Restart, re-launch Mail and test. If the problem is solved, recreate any required Mail settings and import any emails you want to save from the folder on the desktop. You can then put the folder in the Trash. If the problem remains, return the folder to where you got it replacing the one that is there. 

If that doesn’t solve it repeat the above using Containers/com.apple.MailServiceAgent.

Information learned from Linc Davis. Thanks to leonie for some information contained in this.

Mail crashing

Crashes/quits unexpectedly

That seems to have fixed it, thanks so much!

You are welcome.

For future readers, here is another solution that worked. It seems Apple Mail crashes when it gets too large (too much data stored). Unfortunately, Apple isn't smart enough to build and alert to tell you Mail has reached its limit.

1. Quit Mail completely
2. Turn Off WiFi
3. Launch Mail app, access Mail>Preferences>Accounts
4. Disable existing accounts added one by one by unchecking the box beside each account
5. Back-up old emails to an external drive. Delete old emails from Mail.
6. Quit Mail again, connect to the internet, then relaunch Mail.
7. Enable all account one by one again. Remember that you should let each account download all it’s mail before you enable the next one.

Thanks.  How does this solve the too much mail issue though.  Wont the fresh mail downloads get one back to the same place?

Hi Eric-

I have a similar issue.  Mail keeps on quitting because of an index error, rebuilds, works for a bit, quits, rinse repeat....

What is interesting is that the identical mail setup (i restored mac 2 through a time machine backup of mac 1) works great on mac 1 but not mac 2!

Any ideas for what i might try - THANKS!

This totally helped, thank you!

Originally my apple mail would crash (iMac running Sierra) when i sent emails some of the times but not all the time. Then it would start crashing when i just opened the app, again only some of the times. Finally it started just crashing each time I tried opening apple mail.

Found this thread and moved my com.apple.mail to the desktop and restarted and everything works great now! Feels much snappier but not sure if thats just in my head.

I'm wondering about that folder, is it just all settings? Mine is roughly 1.5GBs. Not going throw it away but curious when and why I would need to try and access anything in it.

Thank you!!

You are welcome. There might be e-mails and some other settings in it.

最後更新：2017-09-02 02:01:31

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