Kernel for OLM to PST: Move Outlook for Mac Mail to Windows Outlook
Kernel for OLM to PST is a $39 Windows tool from KernelApps that converts Outlook for Mac OLM files into Windows PST files, keeping emails, contacts, calendars and folders. It's for anyone moving from a Mac to a PC, or stuck with OLM archives that Windows Outlook can't open.
Windows Outlook has no way to open an OLM file, so an archive exported on a Mac is out of reach without a converter.
Quick facts
- Version: 26.0
- Developer: KernelApps Pvt. Ltd. (Kernel Data Recovery)
- Platform: Windows 11, 10, 8.1, 8, 7, Windows Server 2022, 2019 and older
- Works with: OLM files from all Outlook for Mac versions
- Price: $39 for the Home User license on the order page
- Trial: saves up to 25 items per folder
- Guarantee: 30 days money back
What we checked: installer size 41 MB, dated January 2, 2026 on the vendor's download server, and the order page, which showed $39 for Kernel for OLM to PST - Home User, on November 10, 2026. We didn't convert a real OLM file ourselves.
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Overview
Kernel for OLM to PST loads your OLM files, shows the mailbox in a tree with a preview, and walks you through output type, filters and destination. Everything happens on your PC, and no mail is uploaded to a server.
Output types, from PST to Office 365.
Features
Many output choices
Kernel for OLM to PST writes to PST, DBX or MBOX as a single file, or to MSG, EML, TXT, RTF, HTML, MHTML, PDF, DOC or DOCX as separate files. It can also send items straight to Office 365, Live Exchange, IBM Domino and GroupWise.
Filters for a selective move
Kernel for OLM to PST filters by From, To, Subject, folder name, item type and date range, so you can skip years of old mail.
Filters narrow what gets converted.
Preview and search
Kernel for OLM to PST previews items before conversion and has a Find Message tool that searches across loaded files.
Searching across loaded OLM files.
Bulk files and split output
Kernel for OLM to PST takes many OLM files with no file size limit and can split large output into smaller PST files.
Reads damaged archives
Kernel for OLM to PST also restores data from corrupt OLM files into healthy PST files.
Benefits
- Private by design. Conversion happens offline.
- Keeps your folder tree, including nested folders.
- Covers more than PST, which helps if your destination is Office 365.
Real-World Uses
- A company moving from MacBooks to ThinkPads with dozens of old OLM archives.
- Someone who left Mac Outlook and needs old mail on a Windows PC.
- Archiving only one client using the sender and date filters.
- Moving an OLM archive into Microsoft 365.
Who It's For, and Who Should Skip It
Buy it if you have OLM files and a Windows PC to convert them on. Skip it if you're staying on a Mac, because this program runs only on Windows and the vendor sells a separate Mac converter. If you only have a mailbox that still exists on a server, simply add the account to Windows Outlook instead.
Usage Guide
- Copy your OLM files to the Windows PC.
- Install and open Kernel for OLM to PST.
- Add one or more OLM files.
- Preview the mailbox and tick the folders you want.
- Choose PST as the output type, and set any filters.
- Pick a destination and click Finish.
- Open the PST in Outlook through File, Open & Export.
Before you buy
The Home license is for personal use on one computer, and the vendor includes one year of free feature updates and a 40 GB limit on it, so a very large archive may need a bigger license.
Where it falls short
- Windows only, even though it converts a Mac format.
- Home is capped at 40 GB per the license table.
- A 4 GB RAM minimum is high for this kind of utility.
What Users Say
On the vendor's page
Kernel's page shows 4.9 out of 5 from 518 reviews, collected on its own site.
"We recently switched from MacBooks to ThinkPads with dozens of old OLM files. But no email client in Windows supports OLM files. Kernel OLM to PST converter tool easily converted all of the OLM files to Windows PST files" Elizabeth Morris, US
"I do not trust online OLM to PST converters. For me, offline conversion capability was a must. This OLM to PST converter software works exactly as I wanted and converted my 50+ OLM files into PST without losing any email." Tawnya Falkner, US
"I was surprised by how easy-to-use this tool is. Also, the support team is very helpful and quick to provide a resolution to any issue. Overall, a nice tool for converting OLM files for a complete beginner." Carl Lee, US
"After trying of manual methods, I decided to use the Kernel for OLM to PST tool. This tool easily converted my OLM emails to PST format. The best thing I liked about the tool is that it preserved all the attachments during the conversion." Reza Hakimpour, US
Elsewhere
Independent reviews of this tool are few. Trustpilot gives the company as a whole 4.9 out of 5 from 166 reviews across its email and migration products.
Editions and Pricing
| Edition | Price | Who it covers |
|---|
| Home | $39 | Personal use, a single computer |
| Corporate | $199 | A single organization, multiple computers |
| Technician | $299 | Consultants and service providers, multiple organizations |
FAQs
Does Kernel for OLM to PST run on a Mac?
Kernel for OLM to PST runs on Windows only. The vendor sells a separate Kernel Mac OLM Converter.
Does Kernel for OLM to PST upload my emails?
Kernel for OLM to PST converts locally and sends nothing to a server.
Will Kernel for OLM to PST keep my folder structure?
Kernel for OLM to PST recreates each folder, including nested ones, in the PST file.
Can Kernel for OLM to PST handle a damaged OLM file?
Kernel for OLM to PST can restore data from a corrupt OLM file and save it as a PST or another format.
Is there a file size limit in Kernel for OLM to PST?
Kernel for OLM to PST advertises no file size restriction on OLM files, though the Home license table lists a 40 GB limit, so check the license you buy.
System Requirements
- Windows 11, 10, 8.1, 8, 7; Windows Server 2022, 2019 and older
- Pentium-compatible processor
- 4 GB RAM minimum
- 500 MB of disk space
Conclusion
At $39, Kernel for OLM to PST is an easy recommendation if you have OLM files to bring to Windows, particularly since the conversion stays on your own PC and the trial shows real results. The reason to pause is the 40 GB limit on the Home license if your archive is bigger than that.
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