---
title: "How to Open an Apple Mail Export (.mbox Folder) on Mac"
description: "Apple Mail exports a .mbox folder with a file called “mbox” inside. How to export from Mail and open the result on your Mac, step by step."
url: https://mboxviewerpro.com/guides/how-to-open-apple-mail-export-on-mac/
language: en
updated: 2026-06-11
source: Mbox Viewer
---

[All guides](https://mboxviewerpro.com/guides/)

# How to Open an Apple Mail Export (.mbox Folder) on Mac

Apple Mail exports a .mbox folder with a file named “mbox” inside — that file is your mail in standard mbox format. Here's how to export from Mail and read the result with Mbox Viewer.

PublishedJune 11, 2026

Apple Mail (the built-in Mail app on macOS) can export any mailbox to the open [**mbox**](https://mboxviewerpro.com/glossary/mbox/) format. It’s the perfect way to archive old mail, hand a mailbox to someone else, or keep a copy outside of Mail. The export has one quirk worth knowing about — but Mbox Viewer handles it for you. Let’s walk through it.

## Step 1: export the mailbox from Apple Mail

1.  Open **Mail** and select the mailbox you want to export in the sidebar.
2.  Choose **Mailbox → Export Mailbox…** from the menu bar.
3.  Pick a destination folder and click **Choose**.

Mail writes the export to the folder you picked.

## Step 2: understand what Mail actually exported

Here’s the quirk: Apple Mail doesn’t export a single file. It creates a **folder** named after your mailbox, ending in `.mbox` — for example `Inbox.mbox` or `Receipts 2019.mbox`. Inside that folder you’ll find:

-   a file named simply **`mbox`** — this is the real archive, with every message in standard mbox format
-   one or more `.plist` files — metadata that Mail uses internally; you can ignore them

So `Inbox.mbox` is a container; the file called `mbox` inside it is your mail.

## Step 3: open the export with Mbox Viewer

Mbox Viewer opens the `.mbox` export package directly — you don’t need to dig out the inner file:

1.  In Finder, locate the exported folder (e.g. `Inbox.mbox`).
2.  **Drag it onto Mbox Viewer** (or use **File → Open** in Mbox Viewer and select the `.mbox` folder).

Mbox Viewer finds the `mbox` data file inside the package automatically and opens it. (Opening the inner `mbox` file directly still works too, if you prefer.)

That’s it. It opens read-only, your original export is never modified, and you can [search](https://mboxviewerpro.com/guides/search-syntax-cheat-sheet/), browse threads, preview [attachments](https://mboxviewerpro.com/glossary/attachment/) and export individual messages to [EML](https://mboxviewerpro.com/glossary/eml/), CSV or text.

## Nested mailboxes

If you export a mailbox that contains sub-mailboxes, Mail creates nested `.mbox` folders. Each level has its own inner `mbox` file — open each one the same way.

## Why this beats re-importing into Mail

Re-importing an archive into Apple Mail mixes it back into your live mail and can take a long time for big exports. Opening the export with Mbox Viewer keeps the archive exactly as it is — a self-contained, read-only snapshot you can search instantly, even when it’s [tens of gigabytes](https://mboxviewerpro.com/guides/how-to-open-mbox-file-on-mac/).

## Open your archive with Mbox Viewer

Native Mac and Windows app. Streams MBOX and EML files of any size, fully offline.

[Mac App Store](https://apps.apple.com/app/mbox-viewer-pro/id6759237715) [Microsoft Store](https://apps.microsoft.com/store/detail/9NW3GVFG7DDB)