| Feature Aspects | What Does It Do? | Description | User Benefits |
|---|---|---|---|
| Advanced OLM | Opens and reads OLM files without Outlook for Mac. | Uses a proprietary OLM parsing | Faster conversion with no Outlook dependency. |
| Parsing Engine | Outlook for Mac. | engine to extract mailbox data directly from the OLM database. | dependency |
| Metadata Preservation | Keeps all email information intact. | Preserves sender, receiver, CC, BCC, subject, timestamps, Message-ID, and Internet headers. | Maintains email authenticity for legal and business purposes. |
| Folder Hierarchy Retention | Maintains the original mailbox structure. | Recreates the complete parent-child folder hierarchy during export. | No need to reorganize emails after conversion. |
| Batch OLM Conversion | Converts multiple OLM files in one operation. | Multi-file processing engine queues and converts several mailboxes simultaneously. | Saves significant time for administrators. |
| Duplicate Email Detection | Prevents duplicate emails from being exported. | Compares unique email properties such as Message-ID, Subject, Sender, and Date. | Eliminates redundant data and reduces storage. |
| Attachment Management | Include or exclude attachments during export. | Separates attachment streams while maintaining email references. | Gives flexibility and saves storage space. |
| Preview Before Conversion | View mailbox items before exporting. | Loads mailbox index and metadata without modifying the original OLM file. | Ensures you're converting the correct data. |
| Unicode Support | Converts emails in all major languages. | Supports UTF-8 and Unicode character encoding throughout the conversion process. | No language or character corruption. |
| High-Speed Conversion Engine | Converts mailboxes quickly. | Optimized algorithms minimize disk I/O and memory consumption. | Saves time during large migrations. |
| Direct Cloud Migration | Migrate directly to cloud platforms. | Uses secure APIs and IMAP protocols to upload mailbox data directly to cloud services. | Eliminates intermediate conversion steps. |
| PST Split Option | Creates smaller PST files automatically. | Splits PST files based on user-defined size limits during export. | Prevents oversized Outlook data files |
| Email Property Preservation | Keeps email formatting and structure intact. | Retains HTML formatting, inline images, hyperlinks, signatures, and embedded objects. | Emails look identical after migration. |
| Secure Offline Processing | Converts mailboxes without uploading data online. | All processing is performed locally on the user's machine. | Improved privacy and data security. |
IT Administrators
Enterprise IT teams manage large-scale mailbox migrations from Mac-based Outlook environments to platforms like Microsoft 365, Google Workspace, or IMAP servers.
Why they need it:
To automate bulk OLM migration while maintaining mailbox integrity.
Managed Service Providers (MSPs)
IT service providers handling multiple client email migrations and cross-platform transitions.
Why they need it:
To reduce manual effort and deliver faster migration projects.
MacSonik OLM Migrator Utility is designed to migrate and convert complete Outlook for Mac mailbox data with full accuracy.
Transfers all email messages, including:
Exports all associated attachments such as:
Moves complete address book details, including:
Transfers calendar events along with:
Exports task-related data, including:
The tool allows users to preview Outlook notes entries before conversion, helping them review important information stored in the OLM file. While notes are visible in the preview panel for analysis, they are not transferred during the conversion process.
Maintains complete mailbox organization, including:
Preserves additional email components like:
Demo Version
The trial version of MacSonik Mac OLM Converter Tool lets users test the tool before buying. All output formats and features are accessible in the demo, with a limit of 50 emails per folder.
System Requirement
Hard Disk Space: 1 GB of free space required
RAM: Minimum 4 GB (8 GB Recommended)
Processor: Apple Silicon M1, M2, M3, M4, and newer Apple Silicon processors (including M5)
Requirements & Supported Versions For Mac
Version: 26.06
Size: 247 MB
Release Date: June 2026
License Tyes: Home, Administrator, Technician, and Enterprise
Processor:Apple Silicon (M1 or M2) or Intel-based Mac systems
Operating System: macOS 10.13 High Sierra, macOS 11 Big Sur, macOS 12 Monterey, macOS 13 Ventura, macOS Sonoma, and later versions of macOS (10.15 "Catalina")
Software Prerequisites
Additional Information
To run this tool smoothly on a Mac, follow the steps below:
Getting an error while saving the output to your defined location?
It is advised to avoid the source file from any shared drives or networks (NAS, SAN, LAN, and WAN), as it should be on the same working machine
| Main Features | Free Trial Version | Full Version |
|---|---|---|
| Convert OLM to 20+ File Formats | 50 Files per folder | Unlimited Conversion |
| Migrate OLM to Gmail, MS 365, IMAP, and other email clients | 50 Emails per folder | Unlimited Migration |
| Bulk OLM File Conversion | 50 Items per folder | Unlimited Conversion |
| Add Single/Multiple OLM Files | ||
| Preview Emails and Attachments | ||
| Preview Contacts, Calendars, Notes, and Tasks | ||
| Preserve Folder Hierarchy and Metadata | ||
| Date Range Filters | ||
| Remove Duplicate Emails | ||
| Split Large PST Files | ||
| Custom Naming Convention | ||
| Save Attachments Separately | ||
| Latest macOS Compatibility | ||
| 24*7 Technical Support | ||
| Download and Purchase | Download | Buy Now |
A global consulting firm with 400+ employees needed to migrate over 350 OLM mailboxes (approximately 1.5 TB of data) from Outlook for Mac to Microsoft 365. Manual migration methods proved too slow and risked disrupting business operations.
Using the MacSonik OLM Export Tool, the IT team performed a bulk migration while preserving emails, attachments, contacts, calendars, folder hierarchy, and metadata. The entire migration was completed in under 16 hours with zero data loss and minimal downtime.
Ans: The tool validates mailbox objects before migration and performs integrity checks to ensure that emails, attachments, contacts, and calendars are migrated without data corruption or loss.
Ans: Yes. The software maintains the original MIME content, including multipart messages, embedded images, HTML formatting, and email headers to preserve message authenticity.
Ans: Yes. It accurately recreates multi-level folder structures, including parent and child folders, while maintaining their original hierarchy.
Ans:If a migration is interrupted due to network failure or system shutdown, the software can resume the process from the last successfully migrated item (feature availability depends on the destination platform).
Ans: Yes. Before migration begins, the software verifies destination connectivity, authentication, mailbox accessibility, and available permissions to reduce migration failures.
Ans: Yes. The tool processes emails containing large attachments while preserving attachment names, formats, and associated metadata. The maximum supported size may depend on the destination server's upload limits.
Ans: The software compares unique email properties such as Message-ID and other metadata to identify existing items and avoid creating duplicates during incremental migrations.
Ans: The OLM exporter software preserves recurring event patterns, meeting schedules, reminders, attendees, and time zone information where supported by the destination platform.
Ans: Yes. The MacSonik OLM migrator software supports batch processing of multiple OLM files, making it suitable for enterprise mailbox consolidation and large-scale migration scenarios while maintaining data integrity and migration accuracy.
Ans: Yes. The MacSonik tool fully supports Unicode encoding, ensuring emails in languages such as Japanese, Chinese, Arabic, French, German, Hindi, and other international languages are migrated without character corruption.
Ans: Yes. Batch migration allows users to add multiple OLM files and process them in a single operation, improving efficiency for enterprise environments.
Ans: No. The software performs a read-only operation on the source OLM file, ensuring the original mailbox data remains unchanged.
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