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I have received a .msg file as an attachment from a coworker. I am using OS X and there are no default programs to open the file. Does anyone know how I can open a .msg file on my Mac?

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I believe Outlook for Mac should be able to read them, but if you don't want to buy that or generally don't want to install Microsoft programs on your Mac, MailRaider is a free program that should be able to read those files just fine.

Are you a Switcher? Have you got old e-mails archived somewhere? Have you ever wished that your Mac could read your old Microsoft™ Outlook .msg files? If so, MailRaider could be just what you need.

It should be able to read the files and even save attachments. You can find the documentation here (PDF).

Here's a caveat about files that don't originate from Outlook:

Sadly, there are many other programs out there which use the .msg file extension. If your .msg file wasn’t written by Microsoft Outlook then MailRaider won’t be able to read it. If you’re able to open the content in an editor like TextEdit then it may be that the file will open happily in Apple Mail if you just change the extension to .eml.

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