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Mailvita PST to MBOX Converter for Mac Tool is a viable alternative to convert Outlook PST files to the MBOX mailbox file format. The application converts big PST files to MBOX format in bulk. It can convert all emails and attachments from Outlook PST files to MBOX without losing any data. This tool is simple to use and offers intuitive UI. Supports both sorts of operating systems, including Mac and Windows OS versions. Download the free trial versions.