Hi all. One can easily convert the MBOX file to PDF file format using Import Mailbox Wizard in Mac OS. To do so you just need to Open APPLE MAIL APPLICATION and using Import Export you just need to select the file format in .PDF extension. If you are found this trick difficult then you can go through this article Best methods to Convert MBOX to PDF with Attachments Free in MAC s . After clicking on this you can find the easy manual methods to convert thunderbird mail to a PDF file. Also after reading this post you will able to transfer files with attachments such as images gifs etc. I hope you will find this information useful to solve your query. Thanks for reading.