CubexSoft PST Converter for Mac 1.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. This Mac app is a product of CubexSoft PST Converter for Mac.
From the developer:
How to export emails from PST to any other format or cloud account on Mac OS? Download CubexSoft PST Wizard for Mac solution which is especially comes for Mac PST convert mail to PDF, MSG, MBOX, EML, EMLx, DOC, HTML, Outlook.com, Office 365, Gmail, G Suite, Exchange Server, Hosted Exchange Server, and many others. PST Converter for Mac Tool is capable to perform batch PST files migration on Mac OS in a single round of process only.
You may want to check out more software for Mac, such as MailVita MBOX to PST Converter for Mac, MailVita EML to PST Converter for Mac or MacArmy PST Converter, which might be similar to CubexSoft PST Converter for Mac.
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