diff --git a/windows/security/threat-protection/microsoft-defender-atp/mac-whatsnew.md b/windows/security/threat-protection/microsoft-defender-atp/mac-whatsnew.md
index 617e8532aa..2ae1e83837 100644
--- a/windows/security/threat-protection/microsoft-defender-atp/mac-whatsnew.md
+++ b/windows/security/threat-protection/microsoft-defender-atp/mac-whatsnew.md
@@ -30,6 +30,14 @@ ms.technology: mde
 > [!IMPORTANT]
 > Support for macOS 10.13 (High Sierra) will be discontinued on February 15th, 2021.
 
+## 101.19.48
+
+> [!NOTE]
+> The old command-line tool syntax has been deprecated with this release. For information on the new syntax, see [Resources](mac-resources.md#configuring-from-the-command-line).
+
+- Added a new command-line switch to disable the network extension: `mdatp system-extension network-filter disable`. This command can be useful to troubleshoot networking issues that could be related to Microsoft Defender for Endpoint for Mac
+- Performance improvements & bug fixes
+
 ## 101.19.21
 
 - Bug fixes