If you are searching for the best tool to open PST files on Mac, I suggest you use the MacSonik PST Viewer. The software can read and view PST files without Outlook installation. It can convert PST files into PDF, MBOX, HTML, MSG, CSV, EML, EMLX, CSV, and many other formats. Using this tool, you can also break down bulky PST files. It is highly compatible software to split large Outlook PST files into smaller ones, including emails, contacts, events, calendars, and more items.