The free OLM to MBOX conversion allows users to perform manual conversion procedures. The user needs to launch Outlook for Mac and choose the emails or folders that they want to convert into MBOX format. The user should drag the items into a Mac folder. The emails will be saved as .EML files. The user should now proceed to install Mozilla Thunderbird before opening it. The user should create a new local folder, which he will use to import EML files. Thunderbird stores emails in MBOX format by default. The method provides free access, which benefits users with small mailboxes. The process takes a long time, but it does not maintain the correct folder structure or email metadata during the operation. That reason suggests an alternative tool like the Gaintools OLM to MBOX Converter or any software for fast and secure OLM to MBOX conversion without losing data.