Importing a PST file to an Office 365 primary mailbox from a Mac is possible with a compatible migration solution. You do not necessarily need to install Outlook on your Mac for every migration method. However, check the software's operating system compatibility before choosing a tool, as some utilities are designed specifically for Windows.

For this task, Aryson PST to Office 365 Migration Tool provides PST migration features, including multiple file selection, mailbox preview, and destination mailbox mapping. However, this tool is Windows-based, so it cannot be presented as a native Mac application. Mac users would need access to a supported Windows environment to run it.

If your goal is to import PST file to primary mailbox, the tool also offers options such as date-range filtering, duplicate removal, and folder-hierarchy preservation. It supports transferring PST mailbox data, including emails and attachments, to Office 365. These features can help organize the migration before transferring the selected data.