Mail App does not startup properly, hangs, etc.

This issue started for me shortly after the Yosemite upgrade. I'm on a 2011 MacBook Pro, 13"

When opening Mail, the window will come up with only senders and subject lines for existing emails (left-side pane - the two-line email preview is missing). In addition, the preview pane will show nothing, even if I click on an existing email. New emails are NOT received, and any emails composed at this time are NOT sent. Waiting does nothing - the app stays in this useless state.

Closing the app requires a Force Quit. At first, re-opening the app would solve all the problems, and it would behave normally. Now, more often than not, it requires TWO Force Quit/restarts to get the app to load and function properly.

What is the deal here? This is getting really frustrating...please help.

MacBook Pro, OS X Yosemite (10.10.5), 2011, 13"

Posted on Sep 2, 2015 4:07 PM

16 replies

Apr 11, 2016 8:08 AM in response to BastilleMktg

So I went in through Internet Accounts (System Preferences) and all of my email accounts had Mail unchecked. I rechecked them all. All would stay "checked" except for one - the work one that I need the most (of course!). I reopened Mail and all of my mail was there - even the work stuff. I'm hesitant to close it again. My Smart Inboxes were gone so I had to rebuild the UNREAD mail one I have. but even that is working now including the work emails! What the heck does this mean? Am I in the clear? Or is it a false sense of hope?

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Mail App does not startup properly, hangs, etc.

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