I recommend using an automated utility to convert EML to PDF. I prefer and recommend using the EML converter (https://www.convertertools.org/eml-file-converter/) for this purpose. It lets users migrate their different EML data like mailboxes, events, address books to PDF. The tool converts EML data to various file formats like PST, PDF, MSG, HTML, etc. It also assists to import windows live mail data to Outlook, Gmail, Yahoo, IMAP, Thunderbird, etc. It also lets users convert Multiple EML files at one time.

A few time earlier one of my brother also searching solution for Yahoo Backup in Mac OS. He downloaded the Yahoo Backup for Mac on his system. After that, the process becomes quite easy for him because of the support team. They are connected to him throughout the complete conversion process from Yahoo emails to outlook. This is the reason I am suggesting you this tool but one is important this tool will runs in Mac OS only. Visit:- https://www.toolscrunch.com/mac-yahoo-backup.html

I am facing trouble to convert my MBOX data to PDF and I am unable to find an absolute application which can smoothly perform the task. Can anybody suggest me a solution for this which can do complete migration without any data loss?