Answers...

to commonly asked questions.

Open Winmail.dat files on a mac

I can't open attachments on my mac.
___________

Are the attachments winmail.dat format?
___________

Yes
___________

Download TNEFF’s Enough. Should be free. it will give you the ability to open those pesky files. Often there’s nothing in other than a company graphic like the one attached to my own email below. However, the sender has a setting within Outlook they are unaware of that insists on enclosing all attachments in that format. Completely unnecessary. But instead of confusing the sender by telling them they should just turn that setting off in Outlook, just use TNEFF on your end.
This image is a theme.plist hack