Convert PST File to MBOX on Windows & Mac – Quick Guide

Convert PST File to MBOX on Windows & Mac.jpg
Looking for a quick way to convert PST file to MBOX on Windows & Mac? This guide explains the essentials so you can move emails from Outlook to MBOX-based clients like Thunderbird, Apple Mail, or Eudora without hassle.

PST is the default data file format used by Microsoft Outlook to store emails, contacts, calendars, and other items. MBOX, on the other hand, is a popular mailbox format supported by many open‑source and cross‑platform email clients. When users switch from Outlook to Thunderbird or Apple Mail, converting PST to MBOX becomes necessary to keep mailbox data accessible.

On Windows, you typically need a dedicated PST to MBOX converter tool. These tools scan Outlook PST files, preview mailbox items, and export selected folders into clean, compatible MBOX files. On Mac, you can either use a specialized Mac-based converter or export mail from Outlook for Mac and then convert the exported data into MBOX.

Before starting, always create a backup of your original PST file, check Outlook version compatibility, and ensure you have enough storage space. With the right method, you can smoothly convert PST file to MBOX on both Windows and Mac in just a few steps.

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armantsarkaun

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Nov 23, 2025
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If you just need a quick PST → MBOX migration, the main things to focus on are:


1. Make sure the PST isn’t corrupted — running ScanPST first saves a lot of headaches.
2. Keep Outlook closed during conversion so the file isn’t locked.
3. Export only the folders you actually need — it keeps the MBOX files cleaner and faster to import into Thunderbird/Apple Mail.
4. Always test the MBOX in a fresh profile before deleting or archiving the original PST.


Most third-party tools work fine as long as they handle large PSTs and nested folders correctly. The key is backing up first and doing a small test run before the full export.