If you're looking for an OLM to PST converter then you can use the MacSonik OLM to PST Converter for Mac. It is capable of converting OLM files to PST files as well as several other file formats, including PDF, PST, EML, MSG, TXT, HTML, MBOX, DOC, and CSV. One of the best benefits of this utility is that it allows you to back up and transfer your Mac OLM files without attachments. It also helps to remove similar or duplicate email items. Email attachments are not included in the conversion/migration process, thus no data is lost.