Sign-in & Login Problems

Fix Microsoft Account Sign-In Empty Pop-Up on MacBook Air

Chanuka Geekiyanage Sep 25, 2026 869 views

Question details

The user is unable to sign into their Microsoft account on a MacBook Air because the sign-in window appears as an empty pop-up, despite the account functioning correctly on other devices.

How to Fix Microsoft Account Sign-In Empty Pop-Up on MacBook Air

Product: Microsoft Office
Device & OS: macOS
Scenario: Attempting to sign into a Microsoft account to activate or access Microsoft Office applications on a MacBook Air.
Observed behavior: An empty or blank pop-up window displays instead of the standard Microsoft sign-in prompt, blocking the user from entering their credentials.

Before you start

Before proceeding, ensure your MacBook Air is connected to a stable internet connection and temporarily disable any third-party antivirus or VPN software that might be intercepting network traffic.

Solution 1Recommended

Update macOS and Microsoft Office

Ensure your MacBook Air and Office applications meet current Microsoft requirements, as outdated software can cause authentication windows to render incorrectly.

Microsoft frequently updates its authentication protocols. Running an older version of macOS or outdated Office applications can lead to compatibility issues where the sign-in server fails to load the login UI.

Update macOS

Click the Apple menu in the top-left corner, select 'System Settings' (or 'System Preferences'), navigate to 'General', and click 'Software Update'. Install any pending updates.

Check for Office Updates

Open Microsoft Word or Excel, click on 'Help' in the top menu bar, and select 'Check for Updates'. Follow the on-screen prompts to install the latest versions.

Restart Your MacBook

Once all updates are applied, restart your MacBook Air and attempt to sign in to your Microsoft account again.

Compatibility Check: Microsoft currently supports the three most recent major versions of macOS. If your MacBook Air is older and cannot update to these versions, you may continue experiencing sign-in issues.

Solution 2

Clear Cached Microsoft Office Credentials

Remove corrupted login tokens from the macOS Keychain to force a fresh authentication connection.

Solution 3

Test Alternative Networks and DNS Settings

Bypass local network restrictions or bad DNS caches that may be blocking the Microsoft sign-in servers.

Free Microsoft Office alternative

Try WPS Office for Mac as a Seamless Alternative

If persistent Microsoft sign-in errors are keeping you from your work, consider switching to WPS Office. It is a powerful, lightweight, and free alternative that lets you edit documents on your MacBook Air without frustrating login requirements.

1. Download the Installer: Visit the official WPS Office website and download the free macOS version.
2. Install on Your Mac: Open the downloaded file and drag the WPS Office icon into your Applications folder.
3. Open Your Files: Launch WPS Office and directly open your existing .docx, .xlsx, or .pptx files without needing a Microsoft account.

Free and lightweight Office suite fully optimized for Apple Silicon and Intel MacsSeamless compatibility with Microsoft Word, Excel, and PowerPoint file formatsNo complex account sign-in required for basic offline document editingAll-in-one tabbed interface to manage documents, spreadsheets, and PDFs in one window

microsoft office alternative - wps office

Frequently Asked Questions

Why does the Microsoft sign-in window appear completely blank on my Mac?

A blank sign-in window usually happens due to corrupted browser cache data used by the login window, outdated macOS software, or restrictive network and DNS settings that prevent the Microsoft authentication page from loading.

Will clearing Office credentials from my Keychain delete my files?

No. Deleting Microsoft credentials from the macOS Keychain only removes saved login tokens. Your locally saved documents, spreadsheets, and presentations on your MacBook Air will not be affected.

How do I know if my Wi-Fi network is causing the Microsoft sign-in issue?

You can quickly determine this by connecting your Mac to a different network, such as your phone's cellular hotspot. If the Microsoft login window loads normally on the hotspot, your primary Wi-Fi's DNS or firewall settings are likely blocking the connection.

Login & Account Issues