Download vMail OLM to PST Converter Software to export Mac Outlook OLM files to Outlook PST. The software allows previewing OLM files with attachments. There is no need to install Microsoft Outlook for the conversion of Mac OLM files to Outlook PST. You can download free demo versions of windows and MS Outlook version.
Know more info- https://www.vsoftware.org/olm-to-pst-converter.html