Did Your Mac Mail Quit Unexpectedly & Crashes When Importing MBOX ?

A business environment deals with a number of different email clients and interchangeable file formats. One department may be using Apple Mail on Macintosh computer while other use Thunderbird on Windows PC. In order to transfer multiple conversations between multiple platforms, one needs to export data efficiently. There are difficulties and Apple Mac Mail Crashes when Importing MBOX. It can be resolved by simple means and manual methods. Some of those possible solutions have been discussed in this post when OS X Mail / Mac Mail Quit Unexpectedly on Mac Sierra (10.2), El Captain (10.11, Yosemite(10.10), Mavericks(10.9). These are best and reliable procedures which can be implemented by any technical or non-technical user. Continue reading to find out more methods to convert MBOX Files to multiple email clients.

‘I am working on Macintosh – Lion operating system. I just went ahead and uploaded an old MBOX to my Apple Mail account. I had had some of my important conversations saved from back in the old days of using old free Thunderbird client. I quickly imported the file but now it is showing the error: Mac Mail Quit Unexpectedly El Capitan. Since then it has crashed a couple of times and is a great hassle. It has brought in a lot of trouble for me as all my work has come to a standstill. I cannot even open and read my basic daily emails. I am a technical person but even this is an error where Mac Mail Crashes when Importing MBOX is way too complicated for my understanding. Can anybody help me solve this issue?’

Reasons for Mac Mail Crashes when Importing MBOX

Following are some of the possible grounds for the email client not working on Macintosh computer:

• A corrupted email message that stuck the entire transfer
• Power surges that interrupted the import process
• Bad internet connection during uploading MBOX to MAC Mail
• Something wrong with the data file itself
• Damage to the Apple Mail email client or import process

Tips for Solving OS X Mail / Apple Mac Mail Quit Unexpectedly on Mac Sierra, El Captain, & Yosemite

 

Listed here are some of the common ways that can help users if stuck with a similar problem:

Solution#1 Use Migration Assistant

 

This is the Apple’s built-in utility for data and file transfer between two systems. It is designed only for four groups namely: Apps, Users, System Files and Other. This can help with the Mac Mail import MBOX crash issue. It can be used to export data for keeping the applications logs intact. Through this, one can select a single account or multiple mailboxes to move to the new computer. It is totally dependent on the individual.

 

Solution#2 Use IMAP Service

 

• First, configure an IMAP-based account like Gmail, Yahoo, Outlook.com etc. on the old email client.
• Then, create a new folder within the mailbox and transfer the important conversations to it.
• Then, set up the same account in the Apple Mail to remove Mac Mail crashes when importing MBOX error.
• Then, drag and drop the Local Folders and wait for synchronization to take place.
• In case of POP accounts, make sure to select ‘Leave Messages on Server’ from each client.

Solution#3 Search Email One By One

 

• First, open a terminal and go to the below location and check each email folder.

/<Library>/<Mail>/<V2>/<MAIL_ACCOUNT_NAME>

• Then, move some of the items to another directory.
• Do a binary elimination, select half the folders at a time until the group that it crashes on when displaying Mac Mail Quit Unexpectedly
• Then, select half of those again, then drill down to the subfolders.

Solution#4 Rebuild Mailbox & Reindex Messages

 

• Launch The Application
• Go to Mailbox >> The Select Rebuild Option.

 

 

Note: This process May take some time maybe some few minutes or more. It totally depends on the size of you Inbox.

• Now to ReIndex Messages in OS X Mail
• Close your Application
• Enter Cmd+Shift+G . Then Go to Path

  \<Library>\<Mail>\<V2>\<MailData>\ 

• Finally, Delete All Files that begin with “Envelope Index”

Note: Make sure to take backup of these files before you delete them, in case anything goes wrong.
Now Restart your Application to check if, Mac Mail Crashes when Importing MBOX Error has been resolved or not.

Solution#5 Migrate You data to Other Email Client

 

The technology today offers best services and efficient solutions for every difficulty and error faced by human beings. It provides 100% accurate results with guaranteed no data loss and changes in values. One such professional software is Offered by SysTools. It is error proof, user-friendly, trustworthy utility. It is designed just to move data by identifying profiles from multiple MBOX-supported email clients.

Conclusion

There are frequent bugs and issues that occur daily on any given day reported by multiple users. It can cause problems in usual office workings. Each and every technology has its shortcomings and they fail over time and overuse. Even Mac Mail Crashes when Importing MBOX or Mac Mail Quit Unexpectedly is one such common problem and can be solved by performing simple steps manually. These are technical solutions which can be applied without any proper guidance. They are mentioned in a stepwise manner in this post to take reference from. There is also an efficient, reliable and powerful third-party tool mentioned at the end. It is available for free try to download and use for the first time.