I had a bunch of OLM files from my old Mac that I needed to open in Thunderbird on my new PC. Nothing seemed to work — either the formatting got messed up or attachments were missing. Then I tried Softaken OLM to MBOX Converter. Honestly, it fixed my issue; the tool effortlessly converted all my OLM files into MBOX format. The software is super simple to use, and all my emails came through perfectly.
Swiftly emails from Mac Outlook (OLM files) to MBOX format
