You may now use the eSoftTools OLM to PST Converter tool to convert Outlook for Mac OLM to PST files. This software is risk-free and only requires a few simple steps to operate. Calendars, contacts, mail folders, and other data may be easily exported from OLM to the new PST file format. Additionally, you may convert OLM into a variety of file formats, including PST, MSG, EML, and HTML, with this software. You can convert 25 emails from each OLM folder to PST if you get it for free.

More info.https://www.esofttools.com/olm-to-pst-converter.html