Can I Import Several PST Files to Apple Mail at once?

[JoshuaJune]

The direct import of several PST files into Apple Mail simultaneously is not natively supported because Apple Mail uses the MBOX format, whereas PST is Microsoft Outlook's proprietary format. Therefore, to import multiple PST files, you would need to use a specialised PST Converter tool. These professional utilities are specifically designed to batch-convert numerous PST files into a compatible format like MBOX, EML, or a format that can be directly imported into macOS applications. Once the files are converted, you can then import the resulting MBOX files into Apple Mail, often one folder or converted file at a time, depending on the tool's output and Apple Mail's import function. While it requires an extra step and specialised software, this method allows for the effective and simultaneous transfer of data from several PST archives to your Apple Mail application.

Find out all the details to import Outlook PST to Apple Mail from this link.