
Go to the Containers > Data > Library > Saved Application State folder.Hold the Option key and then select Library from the Go menu.

Therefore, try removing Mail’s saved state, and then re-launching Mail: If after upgrading OS X there is some problem with how the prior saved state of Mail is being handled, then this could be the reason for Mail crashing. OS X will save window locations and the open documents for most open programs, so if you quit the program these items will be restored when it is next launched. If this occurs, then reboot normally and try Mail again. This will only load essential features of the operating system, and while you should expect it to run noticeably slower in this mode, it may allow Mail to load properly when launched. If this causes the program to launch successfully, then you can investigate which messages or mailboxes are causing the issue.īoot your Mac into Safe Mode to launch MailĪnother approach is to boot OS X itself into Safe Mode by restarting and holding the Shift key down immediately when you hear the boot chimes. To bypass this and have Mail not select any mailbox or message to show when launched, open the program and immediately hold down the Shift key until Mail is opened. When you open Mail, the program will show the last Mail message that you had selected, and if this message contains errors or corruption that is causing the crash, then this may trigger Mail to always crash when opened.

If mail is constantly quitting after upgrading, and especially if it quits immediately when you open it, then there are several approaches you can take to fix this situation.

This can be exceptionally frustrating to manage, especially when it persists after restarting your system. After upgrading to OS X Yosemite, you might find Apple’s Mail application may crash or hang when you open it, preventing you from accessing any new messages.
