E-mail freezes with black horizontal line

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

Make a backup, preferably 2 on 2 separate drives.

Exit the Mail.

Go to Finder and select your user folder. With this Finder window as the windshield, select Finder/display/display options for presenting or order - J.  When the display options opens, check "show the library folder. This should make your visible user library folder in your user folder. Go to Library/Containers/com.apple.mail.  Move the folder com.apple.mail on your desktop. You must move the entire folder, not just the content.

Reboot, re-launch Mail and test. If the problem is resolved, recreate the required e-mail settings and import emails you want to save to the folder on the desktop. You can then put the file in the trash. If the problem persists, return the folder where you have guessed replacing one that is there.

If he does not repeat the above using Containers/com.apple.MailServiceAgent.

Information derived from Linc Davis. Thanks to leonie for certain information contained in this.

Mail crashing

Accidents / unexpected

Tags: Mac OS & System Software

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