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Convert PST to OLM: Free Way or Using PST to OLM Converter

  author
Published By Jamie Kaler 
Rollins Duke
Approved By Rollins Duke
Published On September 17th, 2026
Reading Time 6 Min Read
Summary: There is no in-built tool offered by Microsoft Outlook to directly convert Outlook PST files to OLM format – however you can still use legacy Outlook for Mac conversion. The better approach is to use the RecoveryTools PST to OLM converter to export PST to OLM without Outlook dependency or without connecting to the internet – all while preserving key components of PST elements like – email (with folder hierarchy), attachments, journals, contacts, calendar & task.

Microsoft Outlook, a popular email platform designed for both Windows and Mac Operating Systems, uses different file formats for data storage. While Windows Outlook stores data in the PST (Personal Storage Table) format, Mac Outlook versions (such as Outlook 2024, 2021, 2019 & 2016) use the OLM (Outlook Mac) format.

Fastest Way to Convert PST to OLM

Here we are going to use the best RecoveryTools PST Converter Tool to convert PST to OLM format without installing Outlook. It offers a straightforward solution for Mac & Windows OS.  This tool provides amazing and advanced features, which allow a smooth process and make it the first choice of users.

With a user-friendly interface and remarkable features, the PST to OLM conversion ensures precise, straightforward, and secure migration.

This tool also offers a trial version using which users can import the first 25 emails per PST folder to Outlook Mac for free. Give it a try and download the free PST to OLM converter.

Note: This tool comes with the free demo version, which allows users to convert only 25 emails from each folder. So users can easily analyze the process as per choice.

How to Perform PST to OLM Conversion? Complete Steps

  1. Download and Install the given tool.

    PST to OLM converter

  2. Add the PST files manually using the Select Files and Select Folders options or automatically and click on the Next button.

    Add the PST files

  3. After uploading all data, all folders and subfolders — along with the required data — will appear on the screen.

    all folders

  4. Click on the Select Saving Option drop-down and select the OLM option from the list.

    Select Saving Option

  5. Click on the Filter Options tab and apply the advanced filter option as per choice.

    Filter Options

  6. The tool will choose a desktop location by default; you can change the location as per requirements using the Browse button.

    location

  7. Lastly, tap on the Convert button to convert PST to OLM without Outlook installation.

    convert PST to OLM without Outlook

Why Choose RecoveryTools PST to OLM Converter?

  • The dual option allows users to upload single or multiple PST files and folders using the Select Files and Select Folders option.
  • Also, Use Recovery Mode allows users to convert corrupted, damaged, orphan, and inaccessible PST files.
  • If any user wants to convert data from a connected Outlook profile, then they can easily do it using the “Convert configured Outlook mailbox data” option, whether profile is working or not.
  • This tool supports all types of PST files exported from Outlook 2024, 2021, 2019, 2016, 2013, and 2010, and newer versions, the same as converted OLM files will open in all Mac Outlook: 2019, 2016, and newer versions.
  • Users can easily convert complete data of Outlook PST files including emails, contacts, notes, journals, calendars, tasks, etc.
  • This PST to OLM converter allows users to retain the original folder hierarchy and email components including Bcc, Cc, To, From, Date, Subject, Formatting, Image, Signature, Font, Text, and other elements.

RecoveryTools PST to OLM Converter Works On

  • Mac OS – Sequoia, Sonoma, Ventura, Monterey, Big Sur, Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion, etc.
  • Windows OS – Windows OS 11 (64 bit), 10, 8, 7 (32 bit or 64 bit) & Windows Server 2025, 2022, 2019, 2016, etc.

How to Convert PST to OLM Format? Free Via Legacy Outlook for Mac

You can only export PST to OLM files using Outlook for Mac Legacy only because New Outlook for Mac still cannot import or export .olm files and is 100% sync based. The manual method for conversion can prove to be unreliable and may cause issues as Microsoft has confirmed legacy Outlook for Mac support ends in October 2026. Post that the OLM support may be implemented in New Outlook or dependency will shift towards third-party PST to OLM File Converters like RecoveryTools – which is trusted secure and offline.

  1. Open Outlook> Go to File> Import/ Export.
  2. Select “Outlook data file” (.PST or .OLM.”)
  3. Choose “Outlook for Windows data file (.PST.)”
  4. Find the directory of the required file.
  5. To start the importing process, simply click the “Import” button.

Why Users Should Not Choose Manual Method?

  • This method will not work with corrupted PST files.
  • Also, users have to follow this method again and again for each export.
  • Mac Outlook should be configured with the subscribed account.

PST VS OLM: Key Differences for Conversion Needs

Users convert PST (Personal Storage Table) files to OLM (Outlook for Mac) format primarily to migrate their Windows Outlook mailbox data into Outlook for Mac. Mostly when they are upgrading devices to ensure platform compatibility or for consolidating archives. Here is how they primarily differ:

Technical Aspect PST (Personal Storage Table) OLM (Outlook for Mac Data File)
Supported Platform New/Classic Outlook for Windows, Office 365 – Import & Export | Import in Outlook for Mac Legacy Outlook for Mac
ANSI Compatibility Older PST variant, latest Unicode No ANSI/Unicode distinction
Skip Empty Folder No Yes
Data/Property Model MAPI (Messaging API) property model XML-based archive representation

Frequently Asked Questions

  • Ques 1: Is an OLM File the same as a PST?

    Ans: Yes, both files have some similarities because both file formats are used to store complete data. But PST is used by Windows Outlook and OLM file format is used by Mac Outlook.

  • Ques 2: How do I create an OLM file?
    1. Choose the Tools option in Mac Outlook.
    2. Select Export >> and check the items.
    3. Choose Continue >> browse location.
    4. Lastly, hit the Save icon.
  • Ques 3: Can I open PST file without Outlook for Mac?

    Ans: Yes, you can open and access PST files on a Mac without installing Outlook by using a compatible third-party PST viewer or converter. These tools let you view the contents of PST files, including emails, attachments, contacts, calendars, tasks, and other Outlook data.

Conclusion

Finally, one should pick a reliable PST to OLM converter to ensure hassle-free conversion of data from Outlook on Windows to Outlook on Mac. The tool recommended in the article is proven to be the most efficient and easy. It has a simple interface and features, making this tool ideal for any version of Outlook on a Mac system. Additionally, a manual approach is available for individuals who want to convert PST to OLM manually. If you do not feel satisfied with the manual method, you can try the free tool by downloading its trial version.

For Vice Versa Conversion from OLM to PST, Use RecoveryTools OLM to PST Converter.

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