I have one of the best Mac MBOX Viewers that helps you easily view, save, or print MBOX files on Mac. Use the MacSonik MBOX Viewer that provides a seamless preview of MBOX/MBS/MBX files from various email clients. It gives you an amazing option to Save MBOX into Distinct File Formats like PST, EML, EMLX, PDF, MSG, CSV, DOC, HTML, and other file formats. The filter duplicate email feature helps you to eliminate duplicate emails from the MBOX file.