The Outlook Exchange MSG files are prone to corruption and taking a backup of these files can be a smart move for a mac user. On the other hand, sometimes due to the storage problem, people want to create a backup of MSG file emails on their mac machines or hard drive. But you must know that the best file format to have the backup of emails is the PDF file format because you can move it anywhere and access it anywhere.

read more:- https://www.macsonik.com/blog/how-to-save-msg-emails-to-pdf-mac/