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Guide · 5 min read

How to open .msg files on Mac without Outlook

You received an Outlook .msg email on your Mac and double-clicking does nothing. Here is how to read it — and export it as a clean PDF — without buying Microsoft Office.

Why .msg files don't open on macOS

The .msg format is a proprietary Microsoft Outlook container based on the Compound File Binary Format (CFBF). macOS has no native handler for it, so Finder, Preview and Apple Mail all refuse to open it. The file is not corrupted — your Mac simply has no app registered for the type.

Common situations: a colleague forwarded an Outlook email as an attachment, a client sent legal correspondence, or you exported an old mailbox from Windows. In every case the fix is the same: use an app that understands the CFBF layout.

Options compared

  • Install Microsoft 365 (≈ €99/year). Works, but requires a subscription, a Microsoft account and several gigabytes of disk space — overkill if you only need to read one email.
  • Upload to an online converter. Free, but you hand your private email — headers, attachments, signatures — to an unknown third party. Not acceptable for legal, medical or business correspondence.
  • Rename to .eml. Often suggested online, but the formats are incompatible — Apple Mail will either show garbled MIME headers or refuse the file entirely.
  • Use a native Mac viewer. A small, sandboxed Mac app that reads .msg directly. Fast, private and no subscription.

Open a .msg file on Mac in 3 steps

  1. 1. Install Email to PDF from the Mac App Store

    A €2.99 one-time purchase. No account, no subscription. Works on macOS 13 Ventura and later, both Apple Silicon and Intel.

  2. 2. Open the .msg file

    Double-click the file, or right-click → Open With → Email to PDF. The email renders with subject, sender, recipients, date, body and attachments — exactly as it would in Outlook.

  3. 3. Export to PDF (optional)

    Click Export PDF to save a clean, searchable copy you can archive, sign or share. Attachments are listed in the PDF header.

Why local conversion matters

Private

Files never leave your Mac. The app runs in Apple's App Sandbox with no network access.

Instant

No upload, no queue, no rate limits. A 20 MB email opens in under a second.

Offline

Works on planes, in secure environments, and inside corporate VPNs.

Also supports .eml and .emlx

The same app opens .eml files exported from Exchange Online, Thunderbird and Gmail, plus .emlx files used by Apple Mail. One viewer for every common email format on Mac.

FAQ

Can I open .msg files on Mac for free?

Only via online converters that upload your email to a third-party server — not recommended for private correspondence. A native app is the only safe free-of-subscription option.

Do I need Microsoft Outlook installed?

No. Email to PDF reads the .msg binary format directly — no Microsoft software required.

Will attachments be preserved?

Yes. Attachments are listed and can be extracted to disk; they're also referenced in the exported PDF.

Does it work on Apple Silicon?

Yes — universal binary for M1/M2/M3/M4 and Intel Macs running macOS 13 or later.

Open your .msg file in under a minute

€2.99 one-time. No subscription. 100% local.

Get Email to PDF on the Mac App Store