To convert your Mac OLM to PST format i want to recommend you this advanced OLM
to PST converter software which is an intelligent software that can easily
convert Mac Outlook OLM files into Outlook PST. The OLM Converter converts OLM
files to various file types such as EMLX, MSG, PST, MBOX, EML, HTML, and PDF.
This software is 100% safe and secure which maintain the original data structure
as it was before conversion. It allow you to convert only selective olm files
into pst format in few clicks. After scanning process, It will save your scanned
file which can be used in future for rescanning.
Technical or non technical both can easily use this software without any
technical skill. It has enhanced easy to use user friendly interface to make
this software fast and simple. This can support all version of MS outlook such
as 97, 98, 2000, 2002, 2003, 2007, 2010, 2013, 2016 and 2019.
Visit it free demo version to more info:-
https://www.filesrecoverytools.com/olm-to-pst-converter.html