There are two ways to convert MAC mail to PST. However, the Manual process takes a lot of time. Hence, I suggest use Apple Mac Mail Converter. It is easy to use and comes with an interactive interface. It can export Apple Mac Mail folders to other file formats like MSG, EML, DBX, etc. It allows users to export Apple Mac data, for eg. emails, contacts, calendars, attachments, notes, etc. Additionally, it has some great features that make conversion easy and quick.