OLM File: When a user works in Mac Outlook, the application creates an OLM file (Outlook Database File) on the local computer.Microsoft does not provide any tools to export Mac Outlook 2016 to PST, so we can do it manually or by using a Mac Outlook 2016 export tool. This is the only way to access your old email messages and other contents in your new email. To switch from Mac to Windows Outlook, we must convert OLM files into PST files. Mac creates an OLM file, whereas Windows Outlook creates a PST file. We will also learn about different techniques to migrate from Mac Outlook to Windows Outlook with the help of the SysTools OLM Converter.Although Mac and Windows Outlook are very much similar in terms of functionality, the two differ in their data storage formats. The user will get a clear idea about OLM and PST file types, their needs, and their differences. Summary: This article is about how to export Mac Outlook 2016 to PST file format.