Attachment Issues

How to Fix Grant File Access Error When Opening Word Email Attachments

Partner Editor Sep 25, 2026 870 views

Question details

Users are unable to open Word document attachments directly from email clients due to a file permission popup.

How to Fix the 'Grant File Access' Error When Opening Word Email Attachments

Product: Microsoft Word
Device & OS: Mac
Scenario: Attempting to open a Word document that was received as an email attachment, primarily using Outlook.
Observed behavior: Microsoft Word displays a 'Grant File Access' prompt and fails to open the attached file, restricting access to the document.

Before you start

Confirm whether you are using the New Outlook for Mac or the classic Microsoft 365 Outlook client, and check if the problem affects only Word files or all Office attachments.

Solution 1Recommended

Grant Full Disk Access to Word and Outlook

Providing Full Disk Access on macOS resolves sandboxing issues that block Word from reading Outlook's temporary attachment files.

macOS employs strict sandboxing rules that restrict applications from accessing files created by other apps. Granting Full Disk Access allows Word and Outlook to communicate properly and exchange temporary files.

Open Mac System Settings

Click the Apple menu in the top-left corner of your screen and select 'System Settings' (or 'System Preferences' on older macOS versions).

Navigate to Privacy & Security

Scroll down the left sidebar and click on 'Privacy & Security', then select 'Full Disk Access' from the right pane.

Enable Permissions

Toggle the switches next to 'Microsoft Word' and 'Microsoft Outlook' to the ON position. You may be prompted to enter your Mac administrator password to apply these changes.

Restart the Applications

Completely close and reopen both Microsoft Outlook and Microsoft Word, then try opening the email attachment again.

Grant Full Disk Access to Word and Outlook

Adding Missing Applications: If you do not see Word or Outlook in the Full Disk Access list, click the '+' button at the bottom of the window to add them manually from your Applications folder.

Solution 2

Save the Attachment Locally Before Opening

Saving the file to your hard drive bypasses the email client's temporary folder restrictions that trigger the error.

Free Microsoft Office alternative

Use WPS Office to Open Word Attachments Without Errors

If Microsoft Word continues to prompt for file access permissions on your Mac, consider switching to WPS Office. It provides a lightweight, hassle-free experience with seamless compatibility for all Microsoft Office formats.

1. Download WPS Office: Visit the official WPS website and download the free macOS or Windows installer.
2. Install the Application: Follow the on-screen prompts to complete the straightforward installation of WPS Office.
3. Open Your Attachment: Right-click your email attachment, select 'Open With', and choose WPS Office to view and edit your file without access errors.

Fully compatible with Microsoft Word (.docx, .doc) formatsAvoids complex macOS sandboxing and Grant File Access errorsLightweight installation with extremely fast launch timesFamiliar user interface requires no retraining or learning curve

microsoft office alternative - wps office

Frequently Asked Questions

Why does Microsoft Word ask to grant file access on my Mac?

This happens due to Apple's macOS sandboxing security feature. When you open an attachment directly from an email, it is stored in a hidden temporary folder. Word requires explicit permission to access files outside its own designated sandbox area.

Is the Grant File Access error limited to Word files?

No, this error can also occur when opening Excel or PowerPoint attachments. The troubleshooting steps, such as granting Full Disk Access or saving the file locally, apply to all Microsoft Office applications on Mac.

Does this issue happen with shared cloud links in Outlook?

Generally, shared OneDrive or SharePoint links open in your web browser or fetch directly from the cloud, bypassing local macOS sandboxing. If you receive an error on a shared link, it is usually a cloud sharing permission issue (e.g., the sender did not grant you access) rather than a local Mac file access error.

Outlook & Email Problems