How to Open Windows mail attachments on a Mac

When you're a Windows OS user it's very easy to send out attachments on emails as .doc documents, made in Microsoft Office or Excel. But just because you're a Windows user doesn't mean your friend or coworker is. Or say that you're a MAC user and your friend keeps loading you with Microsoft Office documents. What do you do, other than telling him to stop already?

Check out this video to learn how to open Windows attachment files on a MAC.