If you are looking for an MBOX to PDF Converter then I will personally suggest you use the
MacSonik MBOX to PDF Converter for Mac. Recently I have used this third-party tool which helps me a lot to achieve better results in less time and using this tool I was able to separate the duplicate emails from the conversion process of MBOX into PDF. It gives an amazing feature that helps you to exclude the attachment file from the conversion process. Using this feature you can Migrate or Backup Without Attachments File.