diff --git a/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac.md b/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac.md
index f643a3b454..546c1e7081 100644
--- a/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac.md
+++ b/windows/security/threat-protection/windows-defender-antivirus/microsoft-defender-atp-mac.md
@@ -33,7 +33,12 @@ You should also have access to Windows Defender Security Center.
 ### System Requirements
 Microsoft Defender ATP for Mac system requirements:
 - macOS version: 10.14 (Mojave), 10.13 (High Sierra), 10.12 (Sierra)
-- Disk space during preview: 1GB 
+- Disk space during preview: 1GB
+
+Beta versions are not supported.
+
+> [!CAUTION]
+> Running any additional third party endpoint protection alongside Microsoft Defender ATP for Mac may lead to and performance problems and unpredictable side effects.
 
 After you've enabled the service, you may need to configure your network or firewall to allow outbound connections between it and your endpoints.