ASBVT

Q: MacMail freezes with black horizontal line

When I open a message in Mac Mail, the screen freezes without a menu bar and a 1 inch horizontal black line covers the message. I had to force a shutdown. When I rebooted/restarted Mail, the same email was still open and froze the screen again, so I had to reboot again. I am running Yosemite 10.10.5 on a 15-inch MacBook Pro from Mid 2010 with a Intel Core i5 2.4 GHz processor and 4GB of memory. Any ideas on what to do?

MacBook Pro (15-inch Mid 2010), Mac OS X (10.6.8)

Posted on Sep 21, 2016 1:16 PM

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Q: MacMail freezes with black horizontal line

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  • by Eric Root,Helpful

    Eric Root Eric Root Sep 22, 2016 11:31 AM in response to ASBVT
    Level 9 (72,578 points)
    iTunes
    Sep 22, 2016 11:31 AM in response to ASBVT

    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

  • by ASBVT,

    ASBVT ASBVT Sep 22, 2016 11:34 AM in response to Eric Root
    Level 1 (8 points)
    Mac OS X
    Sep 22, 2016 11:34 AM in response to Eric Root

    Thanks Eric. I managed to open Mail and close the email that initiated the freeze before Mail crashed again. Now Mail is working normally, so I haven't needed to use your solution. If it persists, and I am unable to unfreeze Mail, I will follow this solution.

  • by Eric Root,

    Eric Root Eric Root Sep 22, 2016 11:36 AM in response to ASBVT
    Level 9 (72,578 points)
    iTunes
    Sep 22, 2016 11:36 AM in response to ASBVT

    You are welcome.