Since there are many professional utilities for OLM to PST conversion for Windows. But, here, I am to provide you the most efficient solution for OLM to PST migration on Mac OS. The tool OLM Converter for Mac converts your Mac OLM email files into Outlook PST format with all its attachments. This tool exports OLM emails to PST, EML, HTML, TXT, EMLX, MBOX, etc. Also, it exports OLM to Apple Mail, Gmail, Outlook, Yahoo, IMAP, Live Exchange, Office 365, etc.
Get more info- https://www.vsoftware.org/blog/import-outlook-olm-into-mac-mail.html
Whenever you want to switch OLM to Outlook PST format then download OLM to PST Converter for Windows. It is available in a free demo version, you can install this tool on your operating system and see its working procedure. It has a simple GUI that can help each non-technical user to activate the app. Someone can certainly run the software and perform the migration of OLM to Outlook PST.
How to Convert OLM to PST using the converter software
Open the Software.
Choose the OLM FIles from your MAC.
Scan & preview the files.
Choose the files which you wish to convert.
Select Finish to end the conversion process.