If you are searching for a simple and safe solution to convert OLM files into multiple file formats then, I would like to recommend a powerful MacSonik OLM Converter for Mac. It can convert OLM files into PDF, PST, EML, MSG, TXT, HTML, MBOX, DOC, CSV, and more file formats.This software allows users to convert all the email items of the OLM database such as emails, attachments, etc into various file formats.  It is compatible with all Mac OS  platforms. The demo edition allows users to save the first 50 items/folders free of cost. Moreover, the application has plenty of powerful features with the help of which users can convert OLM files as per their requirements.