How Do I Open MBOX Files in Thunderbird on Mac?

admin | data migration email conversion mac os MBOX software technology | 4 minutes read | Modified on: 05-06-2025

Hello, I am Lara, I recently shifted to Thunderbird email client from Apple Mail email client. And now I have a need to access my MBOX data in Thunderbird. I am not aware of perfect method for this. Please suggest me a genuine solution that can enable me to import bulk MBOX data to Thunderbird without any data loss. Thanks in advance.

In this article, we will learn how do i open MBOX files in Thunderbird on Mac and Windows. It is wise to backup MBOX files in Thunderbird, also it helps to migrate another email client data to Thunderbird email client. MBOX is a mailbox file and it is able to hold multiple emails. This format is compatible with several email clients for example Apple Mail, Thunderbird, Opera Mail, Sea Monkey, Netscape, Entourage, Eudora, and many more. While Thunderbird is a desktop based open source email client that supports managing emails very well. It supports MBOX files to import.

Professional Method to Import MBOX to Thunderbird on Mac OS

MacArmy MBOX Converter for MacAn expert solution to move MBOX to Thunderbird. It enables to import multiple MBOX emails to Thunderbird at once. The software provides dual ways to upload MBOX data such as Add Files and Add Folder. And this app makes it very simple to select required MBOX data to import to Thunderbird on selective basis. Users are allowed to convert MBOX of all email programs for example Apple Mail, Thunderbird, Sea Monkey, etc.

MBOX to Thunderbird Tool enables to import MBOX to Thunderbird without installation of any addition email client (MBOX supported). Also, the application comes with simple yet interactive interface. Hence, it enables to migrate MBOX to Thunderbird effortlessly. This application is Windows OS based and it also provides free demo option that enables to import 25 MBOX emails to Thunderbird without any charges.

How Do I Open MBOX Files in Thunderbird on Mac? –Working Steps of MBOX to Thunderbird Converter

Download Now

  1. At first download MBOX to Thunderbird Converter on Mac OS.
  2. Now, upload MBOX data with the help of Add Files and Add Folder options.
  3. After that, choose required saving option Thunderbird from the list of multiple saving options.
  4. Then choose destination path as per requirement.
  5. Lastly click on the Export button to start the conversion process.

How to Import MBOX to Thunderbird Via Manual Methods?

Import MBOX Data to Thunderbird using Add-ons

Users need to install Add-ons in Thunderbird email client to import MBOX files to Thunderbird:

Install Add-on Feature – Steps

  1. First open and start Thunderbird email client on PC.
  2. Now click on the three lines setting option situated at the top right corner.
  3. Select Add-ons option, and search for ImportExportTool NG (NextGen).
  4. Then you need to press on the + Add to Thunderbird option to add the plugin.

Import MBOX to Thunderbird

  1. Run Thunderbird email client on your system.
  2. Now press right click on Thunderbird profile.
  3. Choose ImportExportTools NG option.
  4. Then select Import mbox file option.
  5. Now you need to choose “Import directly one or more mbox files”.
  6. Then press on the Ok tab.
  7. Then upload MBOX file from the system.
  8. Lastly you can get a view of MBOX files in Thunderbird email app.

How Can I Import MBOX to Thunderbird in Apple Mail?

Thunderbird for Mac only supports to import files from configured account like Apple Mail, and Eudora.

  1. Open Apple Mail that has configured on the PC.
  2. Now create a new mailbox.
  3. Then, choose Import MBOX file on Mac option in order to import MBOX files from local system to Apple Mail.
  4. Now we have MBOX in Apple Mail.
  5. Then open Thunderbird account and import data from Apple Mail.

Import MBOX File to Thunderbird on Mac

  1. Open Thunderbird on Mac OS.
  2. Go to menu and click on the Tools then Import.
  3. Now go with Mail option and move further clicking on the Next tab.
  4. Choose Apple Mail option, again press on the Next.
  5. Now you get to see MBOX data in the folder named Apple Mail Import.

Are Manual Solutions Feasible to Import MBOX to Thunderbird?

No, manual method requires extra effort, as it does not provide batch emails conversion at once. Also, it makes it mandatory to install Thunderbird email program to import MBOX files manually. Technical skills are required to understand the manual procedure.

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Let’s Conclude

This guide elaborates on manual and professional solution of how do i open MBOX files in Thunderbird. The manual methods to import MBOX file via ImportExport NG Tools, and it does not ensure providing 100% accurate results. While, if you opt for a professional method, users get complete accurate output of batch MBOX conversion in a minimal time. Download MBOX to Thunderbird for Mac Tool on Mac Operating Systems – Ventura, Monterey, Catalina, High-Sierra, Yosemite, Big-Sur, Mojave, etc. For demo purpose, the tool allows importing 25 MBOX emails into Thunderbird without any charges.