The OLM file format is not supported on every platform. That’s why many users want to migrate Mac Outlook to MBOX Format. For this purpose I recommend you to go through this informative blog to Convert OLM to MBOX. This blog provides two methods to export the OLM files into MBOX file format. The first method is the manual approach and the second is the use of the advanced utility OLM Converter tool. Follow the blog to convert OLM files into MBOX file format.