You can also try Mac OLM Converter, another all-in-one solution that allows to convert OLM to PST, PDF, MSG, EML, MBOX, NSF, Office 365 and more. This tool easily Migrate your multiple OLM file to Outlook PST format at one time without any data loss risk. The tool quickly converts all email items including email, attachment, contact, calendar etc. This Software supports all the latest version of MS Outlook.