To convert MAC OLM to PST file format, you can try SysCurve OLM to PST converter. With the help of this advanced utility, you can easily convert OLM to Outlook PST, MSG, EML, MBOX, and other file formats without hassle. The software also allow users to migrate OLM to Office 365. It also comes with a free demo version, which allow users to convert and export the first 20 items per folder.