There are several third-party tools available that can help you convert PST (Personal Storage Table) files to OLM (Outlook for Mac Data File) format. Here are a few popular ones:
PST to OLM Converter is a reliable tool that allows you to convert PST files to OLM file format and various formats such as PDF, MBOX, EML, MSG, DOC, RTF, TXT, PNG, JPEG, Gmail, Office 365, etc. It ensures a smooth and accurate conversion while preserving the folder structure, email properties, attachments, and other data. It offers a user-friendly interface and supports batch conversion for efficient processing.