After I upgraded to OS X 10.11 (currently running 10.11.1), messages are no longer properly displayed in Mail.app: screenshot

All message information is crammed into a space with minimum width, despite the fact that the actual column width is much larger. Resizing the column temporarily restores a correct display but the problem comes back as soon as I switch to another mailbox.

Of course restarting the application, or the computer itself, did not help. I have not seen this problem documented elsewhere. Is it only me?

  • Maybe try switching to Classic view, relaunching & switching back. – Tetsujin Nov 20 '15 at 14:40
  • @tetsujin - Thank you for your suggestion. In fact, I had already tried it before, but switching to Classic view causes Mail to crash at startup. I was lucky to succeed opening the preference pane fast enough to uncheck the option, but this took me back to the same point. This behavior likely indicates that there is something damaged in my mail system, possibly in some configuration file, but I am afraid of losing messages stored locally if I try to reset the Mail library folder. – jmichel Nov 21 '15 at 13:09
  • Have a look at my answer here for how to reset mail without losing anything - apple.stackexchange.com/questions/174727/… – Tetsujin Nov 21 '15 at 15:14
  • @tetsujin - I will try your suggestion when I have some time, but it seems to ma that it more likely to affect the content of mailboxes than the layout of the main message visualization window. – jmichel Nov 24 '15 at 16:27
  • possibly - but it's a lossless process. After that you're down to trashing the prefs etc, which is likely to be more disruptive – Tetsujin Nov 24 '15 at 16:51

Delete the folder ~/Library/Containers/com.apple.mail

You may have to re-enter some preferences. I use MailTags and had to re-enter license data and preference information.

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  • I had missed this reply at time it was posted. I have just tried the suggestion and it did solve my problem. Thanks a lot. – jmichel Apr 5 '16 at 16:32

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