I tried CubexSoft MBOX to PDF Converter to convert MBOX files to PDF with attachments files. The software does wonderful job and migrates batch MBOX to PDF Mac in in just one go. The software supports all the editions of Mac operating system. The working steps are so simple and quick. You can yourself see the working by downloading the demo edition of MBOX to PDF Converter for Mac. It offers free export of upto 25 MBOX files to PDF on Mac machines.