Easy Methods to Convert OLM File to PST Format

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  • Updated on September 4th, 2025

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When switching from Mac to Windows OS, users need to convert OLM to PST to transfer their Outlook data. We need this conversion because Outlook for Mac saves the data in OLM format. And Outlook for Windows stores the Outlook data in PST format. This technical blog will walk you through different methods to carry out this conversion. Along with this, we will introduce a professional Cigati OLM to PST Converter that automates the process. At last, we will look at the frequently asked questions on this conversion process.

Common Reasons to Convert OLM File to PST

The main requirement of this conversion is the platform incompatibility. The following are a few reasons depending on the user’s differing needs:

  • The OLM file format is incompatible with Windows. It needs to be converted to PST format to open it on Outlook for Windows. 
  • The OLM to PST conversion is required to access the OLM backup file in Windows OS. 
  • PST files are flexible and make the data portable across different Outlook versions and Windows OS.
  • To recover the corrupted OLM file, the user needs to convert it to PST as part of their recovery process.
  • IT teams prefer PST files as a backup compared to accessing the OLM backup file. 

Top Ways to Convert OLM to PST Format

Let us proceed with exploring several methods to do this conversion. There are basically two ways: manual and automated methods. We’ll begin with the manual method first, followed by the automated tool method.

Method 01: Manually Convert Mac Outlook OLM to PST

In this method, we use the Gmail email client as an intermediary between Outlook for Mac and Outlook for Windows. 

Follow the steps below to start the conversion process:

Step 1: Move OLM emails to Gmail Email Account

  1. Open your Gmail account and go to See all settings.
  2. Now, go to Forwarding and the POP/IMAP tab and Enable IMAP under IMAP Access.
  3. In Outlook for Mac, click on Preferences > Accounts > +Add Account.
  4. Then, choose Gmail and type in your Gmail email ID.
  5. Afterward, drag and drop OLM emails to the Gmail account mailbox.

Step 2: Export OLM to PST

  1. In Windows, open MS Outlook and head to File > Add Account.
  2. Then, enter your Gmail account credentials and let Outlook configure automatically.
  3. Now, again, go to File > Open & Export > Import/Export and select Export to a file.
  4. Next, choose the Outlook data file (.pst) and select your Gmail account.
  5. At last, select the folders to export to PST and save them at a preferred location. 

Drawbacks: The process will not sync contacts, calendars, and tasks. This method will be time-consuming for large uploads and downloads. Exporting large OLM files to Gmail may not fit the free storage space provided by Gmail. 

Method 02: Automated Tool to Convert OLM to PST Format

If you’re looking for a simple way to access Outlook for Mac data on Windows, use the Cigati OLM Converter. It makes the entire conversion process quick and hassle-free. The tool efficiently converts OLM files to PST, PDF, MBOX, and many other formats. Additionally, users can directly migrate to popular email applications, such as Gmail, Yahoo, iCloud, etc. Smart features include bulk processing, exclusion of attachments, selective export, etc. 

Simplified steps to convert OLM to PST:

  1. Download and install the tool on your system.
  2. Tap Continue and then click on Select Files to browse and open the desired OLM file.
  3. After that, select the mailbox folder from the hierarchy and preview it. Then, click Next.
  4. From the available options, choose PST as the output format. 
  5. Next, opt for the additional settings and tap the Path to Save button to save the file.
  6. Finally, press the Start Process button.

Conclusion

OLM to PST conversion is crucial for users who want to access Outlook for Mac data in Windows. The manual conversion process provides a basic workaround, but it is complex and limited. On the other hand, the automated Cigati OLM Converter makes the entire process, ensuring accuracy and complete data migration. This automated tool clearly outperforms the manual efforts.

You May Also Read: Convert OLM to MSG

Frequently Asked Questions

Q: What is the difference between OLM and PST files?

Ans: OLM file is exclusive to Outlook for Mac, whereas PST file is native to Outlook for Windows. Both file formats are primarily used for backup, archiving, and migration to other platforms.

Q: Can I import OLM files into Windows Outlook without conversion?

Ans: No. Outlook for Windows does not support the OLM files. You need to first convert your OLM file into PST format. Then, import this converted PST file into the Windows Outlook application.

About The Author:

Rohit Singh is an Email Backup, Recovery & Migration Consultant and is associated with Software Company from the last 3 years. He writes technical updates and their features related to MS Outlook, Exchange Server, Office 365, and many other Email Clients & Servers.

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