RECENTProduct updateAction required
macOS | April-2026 | 101.26022.0020
Analysis / inference: Microsoft released a performance and stability update for Defender for Endpoint on macOS addressing high-load degradation.
- Dates
- Source and collection dates not recorded
- Source
- Microsoft Defender for Endpoint releases · Limited verification
- Classification
- Microsoft Security
Section 01 · Summary analysis
Release version 101.26022.0020 includes engine version 20.126022.20.0 and signature version 1.439.74.0, featuring a resolution for a performance regression under high load.
AI summary / analysis; claims are not independently verified. Check the primary source before acting.
Section 02 · Analysis
SecOps Signal analysisWhy it matters
Fixes a critical performance regression in Microsoft Defender for Endpoint on macOS that caused stability and responsiveness issues under high load.
Operational impact
Endpoints experiencing responsiveness issues or stability degradation under high CPU or memory load conditions will see remediation after applying this version.
Section 03 · Recommended actions
- Update Microsoft Defender for Endpoint on macOS to version 101.26022.0020 or later.
- Verify endpoint stability and resource utilization following the update.
What to check
- Verify current macOS Defender for Endpoint agent versions against build 101.26022.0020.
- Monitor fleet performance logs for high load scenarios affecting system responsiveness.
Affected scope
ProductsDefender for Endpoint