Hi,
If you want to save emails from Mac Mail into PDF file format, then you can also opt SysTools MBOX File to PDF format. This Software allows users to export MBOX to PDF with attachments. Using this application, it becomes easy for users to perform MBOX format to PDF document without installing any supportive application. It also allows to search emails and attachments with the help of keywords within the MBOX files.

To Know More, Plz Visit: https://www.systoolsgroup.com/mbox-viewer-pro.html