PST files on Mac: the situation
PST files turn up on a Mac in a few common ways: you switched from a Windows PC and brought your Outlook archive with you; you used Outlook for Mac and exported your mail; or a colleague handed you a PST file to read. In any of these cases, Thunderbird on Mac cannot open a PST file directly — the file first needs to be converted. The PST to Thunderbird Converter does this entirely on your Mac, without uploading anything.
How to convert PST to Thunderbird on Mac
1
Find your PST file on Mac
If you transferred the PST from a Windows PC, it is likely in your Downloads folder or on an external drive. If you exported it from Outlook for Mac, check your Documents folder. PST files use the .pst extension.
2
Open the PST to Thunderbird Converter
Launch the converter on your Mac and select your PST file. No internet connection is needed — the tool processes everything locally. No Outlook for Mac installation is required.
3
Run the conversion
The converter reads the PST archive and produces output files that Thunderbird can import. All emails, subfolders, and attachments are extracted and preserved.
4
Import into Thunderbird on Mac
In Thunderbird, go to File > Import and select the converted mailbox folder. Your emails will appear in Thunderbird with your original folder structure intact.
Works on Intel and Apple Silicon Macs
The PST to Thunderbird Converter runs natively on both Intel Macs and Apple Silicon (M1, M2, and M3). You do not need to run it under Rosetta. It is a proper macOS application that behaves like any other Mac app.
Do I need Outlook for Mac installed?
No. PST files are self-contained archives — the converter reads them directly without Outlook. This is particularly useful for users who:
- Switched from Windows and never had Outlook for Mac
- Had Outlook for Mac but have since uninstalled it
- Want to avoid installing Microsoft software just to migrate email
Thunderbird vs Apple Mail on Mac
Both Thunderbird and Apple Mail are solid choices for email on Mac. Thunderbird tends to appeal to users who want a consistent experience across platforms (Thunderbird runs the same on Mac, Windows and Linux), richer plugin support, or a client that is not tied to the Apple ecosystem. If your end goal is Apple Mail rather than Thunderbird, we also make a
PST to Apple Mail Converter.
What gets preserved during conversion
All email messages
Original folder structure
Attachments
Sent and received dates
Email headers
Subfolders
Online converters vs offline on Mac
Online PST tools require uploading your email archive to a web server. Your email likely contains sensitive personal, financial, or professional information. The PST to Thunderbird Converter on Mac processes everything locally — nothing is transmitted anywhere, and your privacy is fully intact.
Frequently Asked Questions
Does the PST to Thunderbird converter work on Mac?
Yes. It runs natively on macOS, including both Intel and Apple Silicon (M1, M2, M3) Macs.
Can I convert PST to Thunderbird on Mac without Outlook?
Yes. The converter reads PST files directly without Outlook for Mac. No Microsoft software is needed.
I switched from Windows to Mac and have a PST file. Can I use this?
Yes. PST files from Windows work the same way in the converter. Transfer the file to your Mac and select it in the converter.
Does it work on Apple Silicon (M1, M2, M3)?
Yes. The converter runs natively on Apple Silicon Macs.
Will my Outlook folders be preserved in Thunderbird?
Yes. The converter preserves your original folder hierarchy, all emails, and attachments.
Related guides