How do I ensure that my Mac upload is sent in MacBinary format?
You must be running Internet Explorer on the Mac for your upload to be encoded in MacBinary format. You can change the MacBinary settings using the IE Preferences. In the ‘File Helpers’ section there’s a list of file types. If a particular file type is selected as ‘Binary Data’ and ‘Macintosh File’ then uploads of that type will always be in MacBinary format.