If you are searching for a method to convert large PST file to OM file format, then use a reliable PST File Converter software that helps you to bulk export Outlook emails to Mac Outlook OLM file format with all details and information. It has a very simple GUI, both technical and non-technical users can easily use the software without any help. During the conversion process, the software keeps all the folder structures without any changes and data loss. It allows you to batch convert large PST file to OLM file format without Outlook. It was compatible with all the latest and below versions of MS Outlook and Windows OS including Windows 11. You can also use the free demo version of the software without any cost.