Mac users interested in Open source msg viewer for mac generally download:
Outlook MSG Viewer is a Mac-only program which allows you to view Microsoft Outlook .MSG files seamlessly inside your Mac mail client (Apple Mail, Entourage, etc.).nline double-click to open the file as a standard attachment. This is especially handy if you've imported your Microsoft Outlook e-mails from a PC to a Mac, since it often results in some .MSG files.
Xena transforms files into open data formats for long-term digital preservation, encodes content in Base64 and wraps in XML metadata. Formats supported include MBOX, PST, MSG, DOC, XLS, PPT, RTF, PNG, XML, PDF, JPG, TIFF, PCX, WAV, MP3 and more.
Xena is written in Java and is therefore cross-platform, running on OS X, Windows and Linux.
