Copilot in Safari on Mac Returns Empty Sidebar: Workaround Steps

When you open Copilot in Safari on a Mac, the sidebar may appear blank with no content, no chat input field, and no error message. This occurs because Safari’s default privacy settings block cross-site cookies and local storage that Copilot requires to load its interface. This article explains why the sidebar stays empty and provides three workaround steps you can use immediately.

Why Copilot in Safari Shows an Empty Sidebar

Copilot relies on local storage and cookies to load its chat interface and maintain session state. Safari enforces strict Intelligent Tracking Prevention rules that block third-party cookies and limit local storage access by default. When these protections are active, Copilot cannot write the necessary data to your browser, so the sidebar renders as a blank frame.

The empty sidebar is not a sign that Copilot is broken. It is a browser-level restriction that prevents the Copilot web app from initializing. The same Copilot service works in Safari on iPhone and iPad because Apple’s mobile Safari allows the required storage mechanisms. On macOS, the desktop version of Safari applies stricter rules to all websites, including Microsoft’s Copilot domain.

What the Empty Sidebar Looks Like

You see the Copilot icon in the Safari toolbar. After clicking it, the sidebar slides open but shows a white or gray area with no text, no input box, and no greeting. The browser does not display a warning. The only visible element may be the Copilot icon at the top of the sidebar. Closing and reopening the sidebar does not change the behavior.

Workaround Steps to Restore the Copilot Sidebar

Try these methods in order. Each one addresses a specific cause of the empty sidebar. After each step, reload the Copilot sidebar by clicking the Copilot icon again.

Method 1: Disable Cross-Site Tracking in Safari

1. Open Safari Settings
   Click Safari in the menu bar and select Settings, or press Command + Comma.
2. Go to the Privacy tab
   Click the Privacy icon at the top of the Settings window.
3. Uncheck Prevent cross-site tracking
   Clear the checkbox next to Prevent cross-site tracking. This allows Copilot to store session data in the browser.
4. Reload the Copilot sidebar
   Close Settings and click the Copilot icon in the Safari toolbar. The sidebar should now show the chat interface.

Method 2: Clear Copilot Website Data

If disabling cross-site tracking does not work, stale data from a previous Copilot session may be blocking the load. Remove the stored data and let Copilot create fresh storage.

1. Open Safari Settings
   Press Command + Comma to open Settings.
2. Go to the Privacy tab
   Click the Privacy icon.
3. Click Manage Website Data
   Scroll to the bottom of the Privacy pane and click the Manage Website Data button.
4. Find and remove Copilot data
   In the search field, type copilot. Select all entries that contain copilot.microsoft.com or copilot.cloud.microsoft. Click Remove.
5. Confirm removal
   Click Done. Close Settings and reload the Copilot sidebar.

Method 3: Use a Chromium-Based Browser

If you prefer not to change Safari’s privacy settings, open Copilot in Google Chrome or Microsoft Edge on the same Mac. These browsers do not block the local storage mechanisms that Copilot requires.

1. Install Chrome or Edge
   Download Google Chrome or Microsoft Edge from their official websites if you have not already installed one.
2. Sign in to Microsoft 365
   Open the browser, go to microsoft365.com, and sign in with your work or school account.
3. Open Copilot
   Click the Copilot icon in the top ribbon or navigate to copilot.cloud.microsoft. The sidebar loads immediately with the full chat interface.

If Copilot Still Shows an Empty Sidebar

The empty sidebar may persist even after applying the steps above. The following edge cases explain what else can cause the problem and how to resolve each one.

Safari Extension Conflicts

Some ad blockers and privacy extensions override Safari’s cookie settings. Disable all extensions temporarily. Open Safari > Settings > Extensions, uncheck every extension, then reload the Copilot sidebar. If the sidebar appears, re-enable extensions one by one to find the conflicting extension.

Corporate Network Policies

If you use a managed Mac from your employer, your IT department may enforce Safari settings that cannot be changed. In that case, Method 3 using Chrome or Edge is the only workaround. Contact your IT administrator to confirm whether Copilot is allowed on your network.

Copilot Service Outage

A blank sidebar can also result from a temporary outage on the Copilot service side. Check the Microsoft 365 Service Health dashboard at admin.microsoft.com > Health > Service Health. If Copilot shows a warning, wait for the service to recover. No browser changes will fix a server-side issue.

Item	Disable cross-site tracking	Clear website data	Switch to Chrome or Edge
Effect on Safari privacy	Reduces tracking protection for all sites	No permanent change to settings	No change to Safari
Time to apply	30 seconds	2 minutes	5 minutes including browser install
Requires restarting Safari	No	No	No
Works with managed devices	Only if IT allows settings changes	Only if IT allows settings changes	Yes, if Chrome or Edge is installed

Now you can restore the Copilot sidebar in Safari by disabling cross-site tracking, clearing website data, or switching to a Chromium browser. Try Method 2 first because it does not change your overall privacy settings. For daily use, consider keeping Chrome or Edge installed for Copilot tasks so Safari can stay locked down. After applying the fix, test the sidebar with a simple prompt such as Summarize this page to confirm that both the input field and the response area are working.