File Format & Compatibility

Fix OneNote for Mac Cannot Import PDF Files (Grayed Out)

Algirdas Jasaitis Oct 9, 2026 870 views

Question details

The user is unable to import PDF files into OneNote for Mac because the files appear grayed out and unselectable in the import dialog window.

How to Fix PDF Files Grayed Out When Importing to OneNote for Mac

Product: Microsoft OneNote
Device & OS: macOS
Scenario: Attempting to import or insert a PDF document into a OneNote notebook on a Mac computer.
Observed behavior: All PDF files (and potentially other file types) are grayed out in the OneNote importer, preventing the user from selecting and inserting them into their notes.

Before you start

Verify that your Mac has a stable internet connection and open the PDF in a standard reader (like Mac Preview) to ensure the file is not corrupted or password-protected.

Solution 1Recommended

Update OneNote and Verify File Format

Updating the application and ensuring the PDF is not restricted can quickly resolve file compatibility and selection issues.

Outdated software can cause file selection dialogs to malfunction on macOS. Additionally, OneNote does not support interactive or password-protected PDFs directly.

Update OneNote

Open the Mac App Store, go to the 'Updates' tab, and check if there is an available update for Microsoft OneNote. Install it and restart the application.

Check PDF restrictions

Open your PDF in Mac Preview. If it requires a password, remove the password protection by exporting it as a new PDF.

Check storage space

Ensure you have enough available local storage on your Mac and sufficient space in your OneDrive account to accommodate the file.

Import a local copy

Move the PDF file to a local folder (like Desktop or Documents) rather than an external drive or network folder, and try importing it again in OneNote.

File Format Support: Ensure you are selecting a standard PDF, Word document, PowerPoint presentation, or image. Unsupported file types will always appear grayed out.

Solution 2

Re-authenticate and Clear Application Cache

Sign out and clear the app cache to resolve sync glitches or corrupted temporary files blocking the import function.

Free Microsoft Office alternative

Manage and Annotate PDFs Easily with WPS Office for Mac

If OneNote continues to struggle with importing PDFs on your Mac, WPS Office offers a powerful, lightweight, and completely free alternative. With its built-in advanced PDF editor, you can seamlessly read, highlight, and annotate PDFs without dealing with frustrating import errors.

1. Download and Install: Download WPS Office for Mac from the official website and install the application.
2. Open Your PDF: Launch WPS Office, click on the 'PDF' tab, and easily open your file without any grayed-out import restrictions.
3. Annotate and Edit: Use the comprehensive PDF tools to highlight text, add notes, and draw directly on your document.

Highly compatible with Microsoft Office formats and standard PDF files.Built-in PDF editor lets you annotate, convert, and manage documents directly.Lightweight architecture ensures smooth performance on macOS without draining resources.Free to use with a clean, familiar interface.

Frequently Asked Questions

Why are all my files grayed out when I try to upload them on Mac?

Files appear grayed out on macOS when the application does not recognize or support the file format, when the file is currently locked by another program, or due to temporary glitches in the application's file selection permissions.

Can OneNote for Mac import password-protected PDFs?

No. OneNote cannot decrypt or import password-protected PDFs. You must remove the encryption first by opening the file in a PDF reader, entering the password, and printing or exporting it as an unprotected PDF.

How do I fix OneNote syncing issues after importing a large PDF?

If a large PDF causes syncing issues, check if it exceeds your OneDrive storage limits. You can resolve this by compressing the PDF file size before importing it, or by splitting the PDF into smaller, more manageable sections.

Document & File Issues