If you are switching from Mac Outlook to Windows Outlook platform then you will need to convert your Mac OLM file to PST file format if you want to access your Mac OLM file. So in this case if you have not found any reliable tool yet then I would like to suggest you to try this Regain OLM to PST Converter Software that can easily Migrate Mac OLM file to Windows Outlook PST file format in just few clicks. this software supports all the versions of MS Outlook and Windows OS.