Do you want to backup OLM file mail in Outlook PST for Mac OS? Then, download and install OLM to PST Converter for Mac OS Tool that can be used by all technical as well as non-technical users. One can easily backup OLM file mail in Outlook including all contacts, emails, tasks, notes, calendars, etc. You can try this utility with its free trial version to backup OLM file mail in Outlook on Mac OS as it can backup the first 25 items from every loaded folder.