How to Fix ‘no valid MBOX files were found’ Error on Mac
Summary: If you are facing a “no valid MBOX files were found” error on your Mac/PC, stick here with this post. Here, we will provide you with some of the causes behind the error and the best possible way to fix them manually. We will also describe the step-by-step process to convert Thunderbird emails to different file formats and email clients using the Mac MBOX Converter Tool.
MBOX is a file format widely supported by email clients such as Thunderbird, Apple Mail, Opera Mail, SeaMonkey, etc. It is a file format that stores a collection of electronic mail messages. Unfortunately, nothing is perfect, and so is Thunderbird. Sometimes, users find no valid MBOX files error due to which they’re unable to open their Thunderbird files.
Before proceeding further, firstly, know the causes behind this error and after that, move forward to perform the steps that might help you to fix the error.
Causes of Error: No Valid MBOX Files Were Found
There are several instances where users encounter the no valid MBOX file error. Some of them are listed below:
- Compatibility Issue: If the user tries to open the MBOX file in different versions of macOS, they might face this problem.
- Damage or Corrupt Storage Device: The error arises due to the corrupt or damaged external storage space that contains the MBOX file.
- Corrupt MBOX File: If the user wants to open a corrupt MBOX file due to a virus attack, sudden termination, or improper formatting.
In the above section, we have described some of the common causes that are causing the error. Now, let’s proceed further and find the best possible ways to fix the error in MBOX Files that lead to problems i.e. no valid MBOX files found.
How to Solve No Valid MBOX Files Were Found Error?
After identifying the causes of the problem, it is easy for you to understand the problem that displays the error. Here we will provide different methods to solve the issue effortlessly. Also, we will provide a professional way to fix the error.
Method 1: Open the MBOX file Using Thunderbird Email Client Manually
In this section, we will discuss the step-by-step process to import an MBOX file on Mac using Thunderbird. It requires the installation of some add-ons to carry forward the import process. After installing the ImportExportTools, we can proceed further to import the MBOX files to Thunderbird Manually.
- Open the Mozilla Thunderbird on your macOS.
- Navigate the Tools tab and expand the ImportExport option to choose the Import MBOX file.
- Choose the MBOX file and click on the Open button.
- In the wizard, select the Import directly one or more MBOX files option.
- Now your MBOX file is imported into the Local folder of Thunderbird mail.
- At last, you can view your Imported MBOX files items.
Here your MBOX files are successfully imported into the Thunderbird local folder. You can also view and open your MBOX files into different email clients and file formats using the professional method. In the below section, we have described the step-by-step procedure to remove no valid MBOX files were found error.
Method 2: Use Professional MBOX Converter Utility
MacSonik MBOX Converter is the virus-free and most trusted utility that converts the MBOX file into different file formats such as PDF, PST, EML, CSV, TXT, HTML, etc. It also allows users to import MBOX files into Gmail, Outlook, Yahoo, Office 365, and many more email clients on macOS.
Steps to Convert MBOX File Using MBOX Converter Tool
- Download and Run MacSonik MBOX Converter Software.
- Choose the conversion mode Single/Multiple.
- Tap on the Browse button to add the MBOX file and press the Open button.
- Tick the Folder from the tree structure. Here you can also Preview the select MBOX files item.
- Choose the Saving file format or email client from Save/Backup/Migrate As option.
- Now, opt for the additional features as per your requirements.
- Click on the Path to save button and assign a location for the resultant file.
- Finally, click on the Convert button to start the conversion process.
Some Attributes of MBOX Converter Software
- The software supports all types of MBOX files such as MBX, MBS, and MSF on macOS.
- It supports MBOX files created by Apple Mail, Mozilla Thunderbird, and other email applications.
- MBOX converter can bulk convert and save MBOX files to PDF, PST, EML, EMLX, MSG, etc on macOS.
- It allows users to directly export MBOX files into different email clients such as Office 365, Gmail, Yahoo, Outlook, IMAP, iCloud, AWS, etc.
- Users can also migrate MBOX files in bulk by using multiple conversion modes with or without attachments.
- The software provides an option to remove duplicate email mailbox items from the conversion process.
Also Read: How to Fix Mac Mail Search Not Working on macOS?
Conclusion
At last, we would like to say that no valid MBOX files were found faced by many Mac users while trying to open the MBOX file. In the above post, we have mentioned all the manual approaches. However, in some cases, this approach doesn’t work. In that case, users can opt for the professional way that allows the users to convert MBOX files to Outlook and other different file formats & email clients. Thanks for reading this article.
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