Use OLM to PST Converter software which can repair and convert MAC Outlook Emails or OLM Files into Outlook PST Formatted files without any errors.This software save and recover into a new file of any of these formats: PST, EML, MSG file format. It can also support all MS Outlook like: 2003, 2007, 2007, 2011 ,2013 & 2016.
If You want to Convert your OLM files to Outlook PST format, Then you can try a Software Convert OLM to PST. This Software Convert mailbox data such as Inbox, Calendars, Contacts, etc into Outlook PST format. This application also has a Single and Batch Conversion option Where you can select Unlitlmetd files and import them in just once. If you have not any technical knowledge then don't worry this Software does not need any technical knowledge can anyone easily access this Software.
For more information: https://www.spikevare.com/convert-olm-to-pst-file/