OST converter software is best for both batch and selective conversion of OST files.
Primary Steps to Convert OST Files without Outlook on Mac OS
Install OST Converter for Mac
First, download OST Converter and use the setup file and install the tool on your Mac OS X. Upload the OST files/folders on the panel using Add File(s)/Folder(s). Go ahead by pressing the Next button.
Select File Format
The tool is the single-handed solution to export Outlook OST files to multiple emails and document file formats. Options provided in the Select saving options.
Get the Resultant
Finally, click the Export button to initiate the OST conversion process. Post the Conversion, a message such as successful process completion displays. Along with the resultant folder.
Advanced OST Conversion Features — Export Outlook Data with Ease
MacUncle OST converter can convert OST files regardless of mail application. This tool is useful for converting orphaned, inaccessible, corrupted, or other user's OST files. The intuitive user interface will allow the users to convert OST files without restriction.
Steps to Perform Outlook OST Conversion:
Learn in Detail the Characteristics of The Software to Export OST Files
Export Outlook OST to 20+ File Formats
OST converter tool is standalone software with multiple file conversion saving options. Use the tool to converts the Outlook OST files to file formats such as CSV, EML, OST, MSG, HTML, MHT, etc. Users can freely choose any of the mentioned formats without any restriction.
User-Friendly Software Interface
OST Converter for Mac offers a perfect software solution to migrate Exchange OST files to multiple file formats simply and effectively. All the phases of conversion like the selection of files, selecting destination location, file naming option, etc. All these features make the software User-friendly application.
Exports OST with Attachments
MacUncle OST converter software lets you convert Outlook OST email files to a different format with the attachments. The tool converts the OST files with or without attachments. Also, generates an output with different extension by maintaining the data intact.
Convert Outlook OST Files in Batch
OST Converter gives you the option to export both single and numerous files on a Mac computer. Using Add File(s) or Folder(s), users can upload OST files (s). The user can choose individual files from a folder or the entire folder to convert using the Add Folder(s) option.
Get Result with Email Attributes Intact
One of the ongoing worries is whether the conversion may alter the structure of emails. Mac OST converter completes the conversion without any alteration to the email components like From, Subject, Date, To, Cc, Bcc, etc. The complete structure will be intact even after the process.
Offers File Naming Patterns
Mac OST Converter OS allows Mac users to organise Converted Emails in many ways using file name choices like From, Subject, Date, Time, and Year. This feature, which maintains files in a specified way, is crucial for file management. The user can effectively manage their files with this option.
Browse Location for Converted OST File
OST converter tool uniquely operated on the system. Before the conversion ever begins users are asked to enter the destination location. Either browse the destination location or save the converted file to the default location – Desktop. However, the location will open up after completing the OST conversion process.
Compatible with All Latest OS X
OST Converter performs the conversion perfectly on the Mac machine. In other words, the software works with macOS 10.10 Yosemite and all subsequent updates.
Option to Remove Unwanted OST Files
OST file converter allows users to add multiple OST files into software panel. Along with this, it also allows you to remove unwanted OST file from the software UI. Suppose if you added some OST file and after that you realise that you don't want to export some OST files from them. Then simply select the OST file and hit Remove button.
Convert Large Size OST File Easily
MacUncle OST converter tool is an advanced software that allows to export any size OST file. Simply launch the software on your system and browse large size OST file using software panel. After that tool will provide you multiple export options. Here choose one option and hit Export button.
Software Specification
Convert OST Files in Batches
| Version: | v24.11.2 |
| Size: | 20.44 MB |
| Release Date: | February, 2026 |
| Software Download: | Download Now Download Now |
| Trial Limitations: | In order to quickly determine if the OST converter tool is practical or not, the Free Demo version will allow the Mac user to convert up to 20+ emails to a selected file format. |
| Hard Disk Space: | 400 MB of free hard disk space required |
| RAM: | 512 MB of RAM (1 GB is Recommended) |
| Processor: | Apple Silicon M-series (M1 or later) |
| Platforms: | macOS 26 Tahoe, macOS 15 Sequoia, 14 Sonoma, 13 Ventura, 12 Monterey, 11 Big Sur, 10.15 Catalina, 10.14 Mojave, 10.13 High Sierra, 10.12 Sierra, 10.11 El Capitan, and 10.10 Yosemite. |
| Product Guide: | Software Guide Installation Uninstallation EULA |
Click on any image to view the full-screen walkthrough
Find out what is included in Freeware and Pro Version of OST Converter
|
Features |
Trial Version |
Full Version |
|---|---|---|
| Add OST Files and Folders |
25 Files |
Unlimited |
| Convert Multiple OST Files in Batch |
|
|
| Selective Mailbox Folder Conversion |
|
|
| Preserve Email Properties & Metadata |
|
|
| Maintain Original Folder Structure |
|
|
| Process Large OST Files Without Limits |
|
|
| No Restrictions on Number of OST Conversions |
|
|
| Compatible with All Latest Mac OS Versions |
|
|
| 24*7 Free Technical Support |
|
|
| Priority Technical Support |
|
|
| Price |
Free |
$29 |
Understand The Steps to Use MacUncle OST Converter Tool
We Specialize in Assisting Customers
Check Ratings and Reviews of OST Converter.
Performance
96%
Customer Satisfaction
93%
Output Accuracy
100%
Frequently Asked Questions
5 Steps for OST Conversion on macOS:-
Yes, the software support single as well as multiple conversion of OST files in one attempt.
Yes, Of Course, Mac OST Converter is compatible with macOS 10.10 Yosemite and all the latest versions.
Yes, the OST Converter has two different versions i.e., Demo as well as Pro versions. With the trial version one can convert more than 25 files to another format in batches.
What Customers Are Saying
Emma
England
Thank you MacUncle for launching this OST converter. The software is perfect to convert OST files, being a Mac user and to convert an email file is a big concern. I converted all my files in a few clicks.
Noor
Germany
I recently used this software and as I heard the software is amazing. In my experience, I believe this software is best for OST conversion as it exports all files along with my attachments. Best OST converter you could ever find right now.
