Microsoft 365 Alert – Service Degradation – Microsoft Defender XDR – Some macOS devices with multiple security providers may have no display output – RESOLVED

Announcements Sourav Nandi

02/10/2025 08:55:00 AM

NHSmail Reference: INC46645699

Microsoft Reference: DZ1163645

Issue Status: RESOLVED

Issue Description: Some macOS devices with multiple security providers may have no display output.

More info: MacOS devices with multiple security providers may become unresponsive while sleeping.

Final Update: 03/10/2025 08:25:00 AM – Following Microsoft’s extended service telemetry monitoring, they’ve validated that impact has been remediated. Any devices that remain unresponsive will need to be restarted to be updated with their solution.

Scope of impact: Some users may see black screen crashes for macOS devices if their macOS devices were updated after September 29, 2025.

Root cause: A deadlock in Apple enterprise security framework is occurring when multiple security providers are listening to events.

Next steps: Microsoft are further working with Apple to analyze the security framework to help prevent similar issues from occurring in the future.