MC467909: Microsoft Defender for Endpoint on Mac is retiring support of Catalina (10.15)

Microsoft Defender for Endpoint will no longer support macOS version Catalina (10.15) as Apple ended support for Catalina (10.15) in December 2022.

Note: this message applies only to organizations with macOS devices in their environments.

Key points

• Timing: December 15, 2022
• Action: review version of macOS devices in your environment and ensure macOS devices that are still running macOS version Catalina 10.15 are updated to a more recent macOS version.

How this will affect your organization

On December 15, 2022, if your environment still has macOS devices running macOS version Catalina (10.15), after the change any macOS Catalina machine running Microsoft Defender for Endpoint (Mac) will remain protected until the agent expiration, however it will fail to update (error will be logged in /Library/Logs/Microsoft/autoupdate.log ).

What you need to do to prepare

To eliminate risk of losing protection, ensure to update all macOS devices in your environment to a macOS version newer than macOS Catalina.

• Microsoft Defender for Endpoint (MDE) on Mac currently supports macOS versions Ventura (13), Monterey (12) and Big Sur (11).

Refer to MDE (Mac) public documentation for list of system requirements: Microsoft Defender for Endpoint on Mac

Monitor “what’s new on Mac” page for incremental changes across versions of MDE (Mac): What’s new in Microsoft Defender for Endpoint on Mac

Message ID: MC467909
Published: 2022-11-17
Updated: 2022-11-17
Product: Defender, Defender for Cloud Apps, Defender for Endpoint, Microsoft 365 Defender
Platform: Mac, World tenant