Yes, there are professional OLM converters available for macOS, MacSonik OLM Converter tool  is one of the widely used solutions for handling Outlook for Mac OLM files. The software is designed to convert OLM data into multiple formats, including PST, PDF, EML, MSG, CSV, MBOX, HTML, and EMLX, making Outlook data accessible across different email clients and platforms. It also supports direct migration of OLM mailbox data to services such as Gmail, Yahoo Mail, Thunderbird, Outlook, and Office 365.
A key advantage of the tool is its ability to process both single and multiple OLM files without size limitations. Users can preserve folder hierarchy, export emails with attachments, remove duplicate messages, and perform selective conversions using advanced filtering options. The software also offers features such as splitting large PST files, excluding attachments to reduce backup size, and maintaining complete data integrity throughout the conversion process.
Compatible with modern macOS versions and Apple Silicon devices, MacSonik OLM Converter provides a reliable and efficient solution for professional OLM file conversion and migration needs.