June 17, 2024

Easy Ways to Convert OST to CSV File on MacOS [Expert Guide]


If you’re encountering challenges in Convert OST to CSV file on MacOS, you’ve landed on the right page. MS Outlook stores its data in OST format when operating in offline mode. However, difficulties arise when a user can’t access the OST information on their computer for various reasons. In such cases, converting OST to CSV becomes essential. CSV files offer versatility, as they can be opened in applications like Microsoft Excel, MS Outlook, Google Sheets, Notepad, and more.

To discover the most effective method for converting OST files to CSV, read through this article to the end. First, we’ll explore the reasons behind this conversion process. Subsequently, we’ll delve into a manual solution for the conversion process. Additionally, we’ll discuss a professional tool, the MacProTools OST to PST Exporter Tool, as an alternative solution.

An Overview-OST and CSV Files

An OST (.ost) file serves as an offline folder created on a user’s local system when MS Outlook is set up with an Exchange Server. This file facilitates offline work and allows users to synchronize changes with the server upon reconnection.

On the other hand, a CSV (.csv) file is a standard format employed for storing data. Resembling a text file, it uses commas (,) to separate values. CSV files find utility in spreadsheets and databases, as they can be easily transported between various programs.

Reasons to Convert OST to CSV File

The following are some major reasons to export files from OST into CSV.

  • A huge amount of contacts can be stored in CSV files.
  • This format is inclusive of columns and rows, which makes it easy to use for novice users.
  • It is compatible with email clients like Thunderbird, MS Outlook, Gmail, and iPhone.
  • Spreadsheet tools like MS Excel and Google Spreadsheets recover CSV data offline.

Now that you have gone through the reasons to convert OST files to CSV, let’s look at some methods with which we can smoothly perform this process. These remedies are effective and simple to implement.

Convert OST to CSV File Manually

The Manual method is easy to implement and free to convert OST to CSV file. Now follow the given instructions to convert OST to CSV File Format.

Steps For the Conversion Process

  1. Open Outlook and navigate to the File option located in the top-left corner.
  2. Click on ImportExportTools and then select Export All Messages in the Folder.
  3. Next, choose CSV (Comma-separated values) and click on Next.
  4. Select the specific folder from which you intend to export the files into CSV format.


The manual methods are completely free and secure but aside from them here are some drawbacks of the manual method.

  • Using Manual Method does not convert Multiple OST files.
  • Corrupted OST files cannot be exported or converted.
  • Users can not extract contacts from other OST files.
  • It provides limited data only.

Now we will use a professional tool to resolve these drawbacks of the manual method.

Automated Solution to Convert OST to CSV File

It seems like you’re introducing MacProTools OST to PST Exporter as a solution for converting OST files to CSV. If you have specific steps or information you’d like to include about how to use this tool, please provide them, and I’ll be happy to help incorporate the details or rewrite the content as needed.

Salient Features of the Tool

  • This tool empowers users to convert their OST mailbox data into various file formats such as CSV, PST, PDF, MSG, DOC, and more.
  • Users can utilize this tool to convert OST files to different email clients, including Gmail, Yahoo Mail, Office 365, AOL, and others.
  • The tool includes a feature to eliminate duplicate emails during the conversion process, streamlining the task and saving time and effort for the user.
  • It allows users to convert or migrate both single and multiple OST files to different file formats or email clients, facilitating efficient batch conversion.
  • With an advanced feature, users can migrate OST files with or without attachments, providing flexibility in the conversion process.
  • The tool provides options for users to customize the name of the resultant file and the destination path, adding a personalized touch to the conversion process.
  • Compatible with all versions of MacOS, users can easily utilize this tool for their OST file conversion without requiring external assistance.

Steps to Convert Files from OST to CSV Format

  1. Download and launch the MacProTools OST to PST Converter on your Mac system.
  2. Click the Browse button to add the OST files you wish to convert.
  3. Tick the folders from the tree-structured list that you want to include in the conversion.
  4. From the saving format options, choose CSV as the desired format. Apply any additional features required by the tool.
  5. Assign a customized saving location for the resulting file or folder.
  6. Click the Convert button to begin the process of converting OST data to CSV documents.

Note – You can use a free demo version of the converter tool available, allowing you to convert up to 50 emails per folder. The demo version includes all the features of the premium version. If you need to convert more than 50 emails, consider upgrading to the premium version.


In this article, we’ve explored two distinct methods for convert OST to CSV file. While the manual method comes with certain drawbacks, we recommend utilizing the MacProTools OST to PST Converter for a more efficient and streamlined process. The MacProTools converter offers a user-friendly experience and a range of features that enhance the overall conversion experience.