MacUncle OST Viewer

An outstanding program for previewing and reading OST files with Mac OSX. With the software get the preview of OST email along with the attached document. You can conveniently view OST files on Mac OS 10.8 Mountain Lion and all of the above versions without any additional software installation.

  • Preview OST Email on macOS along With the Attachments Associated With It.
  • Sort OST Emails by Attributes: From, To, Subject, Sent, Size, etc.
  • Add Multiple OST Files One by One & View Item in an In-built Viewer.
  • Exchange Server Environment is Not Required to preview and Read OST Files.
  • View Read/Unread Message Status directly from the Software’s Interface.
  • Get Free Installation on Multiple Computers and Personal System.

  • Works with all current versions and above 10.8 Mountain Lion
  • Complete Secured Approach to View OST Files

Read OST File on Mac in 3 Steps

MacUncle’s OST Viewer takes a few steps to viewer OST files.

Install OST Viewer for Mac

Download and Install OST File Viewer for Mac OS freeware and upload the OST file from the system to the software panel using Add File or Add Folder.

Select OST File

In a few seconds, the tool will show all the selected OST folders. Choose the folder whose email messages you wish to view.

Preview OST Files

Now, get the preview of the OST files within the software OST Viewer for Mac itself. Read multiple email OST files without any limitation.

Aspects of Mac OST Viewer

Here are some software features of the OST Viewer for Mac OS.

Standalone File Viewer

A stable program to view and read all attachments with OST email files and free OST Viewer for Mac. The tool ensures that you do not rely on e-mail clients to view OST files on Mac. This means that you can view .ost files on your computer even without any configuration.

Interactive GUI

The OST Viewer for Mac is created to serve the needs of all kinds of users—both naive and experts. The method takes only a few steps, including downloading the tool, viewing folders, and copying e-mail messages. Read all the OST data files in a secure and protected manner. The software is available free of charge.

100% Safe and Secure File Viewer

OST Viewer for free tool works without the help of an Internet connection, thus the tool gives secured service to view OST files on Mac. During the process, the software does not store or save any email message from the user. When you close the application, all the added email files will be removed.

Display Multiple OST Files

Out of all the features, the OST viewer has options like Add File or Add Folder. One can upload single as well as multiple OST files to the software panel without any limitation. View multiple OST files in seconds as the tool load the email files within a click.

Preview OST File’s Properties

The Mac OST Viewer tool lets you view all OST files with attributes. It gives an advance of the date, time, topic, email headers, attachments, signatures, etc. With only a few clicks the user can search all OST file elements. During the process, the OST file viewer Mac program does not change any OST file data.

Read .ost File Including Attachments

The software will display OST messages with attachments from Mac OST Viewer. The user can use OST message attachments such as DOC / DOCX / XLS / PPT/ Image Files and other file types with the program's built-in Attachment View Mode.

Preview Selected OST Files

Another main feature of the portable OST reader Tool for Mac is its ability to select the desired file from the OST folders and to view the files. This feature allows users to view only the desired email files. You will receive a preview of the OST email files as soon as you select the file.

OST Viewer for Mac OS X

MacUncle OST Viewer can be installed on all latest as well as previous Mac Operating System based computers. OST Viewer for Mac Supports 10.15 Catalina, 10.14 Mojave, 10.13 High Sierra, 10.12 Sierra, OS X 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks, 10.8 Mountain Lion, etc.

System Requirement

Get an Overview of OST Viewer Tool Features – DEMO and Licensed Version

Software Name: Mac OST Viewer
Processor: Minimum 2.4 GHz Processor
RAM: Minimum 1 GB
Minimum Hard Drive Space: 100 MB of free space
Operating System: X OS 10.8 Mountain Lion and all the latest Editions.

Software Specifications

  • Support: 10.15 Catalina, 10.14 Mojave, 10.13 High Sierra, 10.12 Sierra, OS X 10.11 El Capitan, 10.10 Yosemite, 10.9 Mavericks, and 10.8 Mountain Lion
  • Processor: 1 GHz Processor (2.4 GHz is recommended).
  • RAM: 512 MB of RAM (1 GB is Recommended).
  • Hard Disk Space: 10 MB of Free Hard Disk Space Required.


Size: 38.0 MB, Version: 1.0

Product Guides

Software Guide Installation Uninstallation EULA


The Mac Freeware Application allows unlimited files to be viewed free of charge. The tool won't convert OST files. For that, you need to get OST File Converter.

Electronic Delivery

The delivery of product is automated. You will receive an email containing both the link to download the product and the activation key within few minutes after payment confirmation.

Request for Software Customization

If you need to customize Mac OST Viewer or need additional features then, Request Quote

Customer Support

OST Viewer Freeware and Upgraded Edition - Comparison

Discover the OST Viewer Free and Pro Version's Features.
Feature Viewer Mac Pro Win. Pro
Option to OST File(s) & Folder(s)
Upload Large OST Files
Read OST File Header
View All Email Attributes
All Macintosh OS versions are Supported
Mac Edition Saving Options: EML, PST, MBOX, MSG, ICS, vCard, CSV, PDF, etc.
Windows Edition Save Options: MSG, EML, MBOX, HTML, MHT, DOC, ICS, vCard, CSV, TIFF, BMP, PNG, PDF,, Gmail, Yahoo, Office 365, Exchange Server, etc.
Export OST File & Store Final Result
Price Free Buy Now Buy Now
Watch How to Viewer OST files on Mac OS
Watch Step by Step Video of Mac OST Viewer

What Customers Are Saying

Verified Purchase Reviews - Mac OST Viewer
Frequently Asked Questions

Get the Mac OST Viewer and carry out the procedure mentioned below –

  • Step 1: Free download OST file viewer on the Mac machine.
  • Step 2: Select OST files using Add File or Add Folder.
  • Step 3: Click on the file to check the preview with attachments.
  • Step 4: Read or copy the email messages from the system.

Yes, add desired OST files and view them one by one by clicking on the files.

Yes, the application to view OST files on Mac maintains the meta-properties while viewing .ost files.

No. The OST File Viewer is designed to read Outlook OST. To save attachments get the OST Attachment Extractor Tool.