OLM to PST Converter for Mac & Windows (2026 Enterprise Edition) Frequently Asked Questions

Windows Outlook cannot open Mac OLM files directly. Prism OLM Converter reads the OLM file and writes a Unicode PST without requiring Microsoft Outlook on macOS or Windows. Guide steps

Yes. Prism OLM Converter is compiled as an Apple Silicon Universal Binary with dedicated ARM64 instructions for M1, M2, M3, and M4 chips. It executes overhead, taking full advantage of unified memory bandwidth for efficient local conversion.

The engine uses a streaming memory-safe iterator that parses emails item-by-item instead of buffering entire gigabyte archives into RAM. To protect Windows Outlook from legacy B-tree file corruptions, you can also toggle Auto-Split PST to divide the output into clean 2GB, 5GB, 10GB, or 20GB volumes.

Yes. The converter extracts all Contacts with full metadata (vCard format, contact photos, job titles, phone numbers, notes) and Calendar events (iCalendar ICS format with recurrence rules, meeting attendees, reminders). These are mapped straight into their corresponding Contacts and Calendar folders in the output PST.

Every converted email, contact, and calendar item is recorded in an embedded SQLite checkpoint ledger in real time. If a power outage, network drop, or accidental shutdown halts the process, relaunching the migration detects the checkpoint and resumes immediately from the exact failure point without duplicating emails.

Yes. You can bypass intermediate PST files entirely by selecting direct cloud ingestion. Authenticate via modern OAuth 2.0 PKCE for individual user accounts or leverage Microsoft Graph API and Google Workspace Admin SDK with P12 Service Account delegation for domain-wide enterprise tenant migrations.

The engine computes SHA-256 and MD5 cryptographic checksums across message bodies, headers, and attachments during the scan phase. When enabled, cross-file deduplication automatically identifies identical messages across multiple OLM backups and skips duplicates, preventing mailbox bloat in the target destination.

Yes. The 7-category data hygiene filter lets you target exact subsets of your data. You can filter by date ranges (presets or custom dates), include or exclude specific sender and recipient email addresses, apply regex subject patterns, filter attachment sizes, and selectively toggle Emails, Contacts, or Calendars.

Yes. The conversion engine recreates the exact nested folder hierarchy—including user-created subfolders, Sent Items, Drafts, and Archive folders. All inline images, file attachments, read/unread status flags, and RFC 822 email headers (To, From, CC, BCC, Message-ID) are preserved.

The free trial download is fully functional across all 10 export formats and allows you to convert and preview up to 50 items per folder. This lets you inspect folder hierarchies, verify email headers, test PST compatibility in Windows Outlook, and test conversion speed before purchasing a license.

Yes. Enterprise licenses include a headless CLI executable (prism-olm --config=job.json) for automated, scheduled migration pipelines. Additionally, IMAP Batch CSV mode allows IT administrators to map hundreds of OLM archives to corresponding target cloud mailboxes in a single automated bulk job with RFC 4180 audit logs.

Following successful payment, your digital license key is delivered to your billing email address. If you need your key resent or require assistance with activation, you can contact our team anytime via our Contact Support page.

We provide free evaluation versions for all tools so you can test compatibility and conversion fidelity on your own data before buying. If you encounter a verified technical limitation or defect that our engineering support team cannot resolve, purchases are covered under the terms detailed on our Refund Policy page.