Security Policy Errors

How to Enable Microsoft Defender Full Disk Access on macOS Sonoma

Bushra Parveen Sep 28, 2026 869 views

Question details

The user needs to grant file access permissions to Microsoft Defender to successfully enable anti-malware protection.

How to Enable Microsoft Defender Full Disk Access on macOS Sonoma

Product: Microsoft Defender for Mac
Device & OS: macOS Sonoma
Scenario: Setting up anti-malware protection and configuring necessary security permissions for Microsoft Defender.
Observed behavior: The required permission prompt does not appear under the Files and Folders settings. Additionally, the Defender Endpoint Security extension may appear grayed out.

Before you start

Ensure you have the administrator username and password for your Mac, as modifying system-level Privacy & Security settings requires administrator authentication.

Solution 1Recommended

Enable Permissions via Full Disk Access

Use this solution to manually grant Microsoft Defender the correct system permissions required for macOS Sonoma, since they are no longer located under Files and Folders.

In macOS Sonoma, system security policies have changed how apps request broad file access. Rather than looking in Files and Folders, you must grant Full Disk Access to specific Microsoft Defender components.

Open System Settings

Click the Apple menu in the top-left corner of your screen and select 'System Settings'.

Navigate to Privacy & Security

Scroll down the left sidebar and click on 'Privacy & Security'.

Access Full Disk Access

In the right pane, locate and click on 'Full Disk Access'. Do not use the 'Files and Folders' menu for this configuration.

Enable Defender Components

Toggle the switches to enable 'Microsoft Defender', 'Microsoft Defender: Endpoint Security', and 'Microsoft Defender: Network Services'. You may be prompted to enter your Mac administrator password.

Restart Microsoft Defender

Close the System Settings window. Quit Microsoft Defender entirely, reopen the application, and try enabling the anti-malware protection again.

Protection Enabled: Once Full Disk Access is granted, Microsoft Defender will have the necessary permissions to scan your system and provide real-time protection.

Solution 2

Test with a New Local Administrator Account

If the Full Disk Access options are grayed out or missing, use this method to determine if your current user profile is corrupted or lacking proper privileges.

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Frequently Asked Questions

Why is Microsoft Defender not showing up under Files and Folders on my Mac?

In macOS Sonoma, Apple updated its security policies. Comprehensive security software like Microsoft Defender now requires broader permissions found under 'Full Disk Access' rather than the localized 'Files and Folders' menu.

What should I do if the Microsoft Defender Endpoint Security toggle is grayed out?

If the toggles in Full Disk Access are grayed out, your Mac might be managed by an organization using an MDM profile that restricts security changes. If this is a personal Mac, try reinstalling Microsoft Defender or creating a new local administrator account to adjust the settings.

Is it safe to give Microsoft Defender Full Disk Access?

Yes. Anti-malware software needs Full Disk Access to scan your entire storage drive for viruses, ransomware, and other threats. Without this permission, the software cannot effectively protect your Mac.

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