
In the save dialog box, delete the ‘dat’ extension and replace it with the intended attachment file type (for example.

Right click (or Ctrl + click) the winmail.dat file in the message and choose “Save Attachment”.Open the email with the winmail.dat file in Mail for Mac.
#OPEN WINMAIL.DAT FOR MAC OS X MAC OS X#
Make sure you have show file extensions feature of Mac OS X for best results. For example, if you receive an email from an Outlook user on Windows that says “Attached is the imported Microsoft Word document”, you know it must be a. Often times, the easiest way to open a winmail.dat file in Mac OS X is to save it and relabel the file as the intended file type.

There are several ways to open and open winmail.dat files in Mac OS X, we’ll cover three of them one with a relabelling trick, another is using an application and another is using a webmail client Method 1: Save the Winmail.dat file as the target file type Since it can be difficult to know the difference between the two in advance, it’s important to know the intent of the email’s sender, if it’s just a non-committal message with a small winmail.dat file attached, it can usually be ignored, while if the sender refers to an attached document that has been displayed up as a winmail.dat file instead of what they point to, you would probably want to try opening it. In fact, Apple is actually telling you to completely ignore winmail.dat files when they arrive in the Mail app, which is often reasonable advice, but in some situations the winmail.dat file is a real email attachment that is incorrectly is identified, and thus opened. Please note that if the winmail.dat file is just a rich text version (TNEF) of the received email, there is little reason to open it as it is just a stylized version of the email that you have already received (just like the difference between TXT and RTF files).
