Vartika FREE Online OLM to PST Converter for Mac
Here you can also use the MailsDaddy OLM to PST Converter tool to migrate MAC OLM file to PST file format. This solution supports all Windows OS and easily migrate large mailbox to Outlook PST, EML, Office 365, Live Exchange etc.
If you have bulk data then you can also use the software and easily migrate OLM to PST
format at once. The free demo version of the software converts up to 50 items from each mailbox.