diff --git a/src/coreclr/clr.featuredefines.props b/src/coreclr/clr.featuredefines.props
index a205c2d280dd1a..cd6569b48b21af 100644
--- a/src/coreclr/clr.featuredefines.props
+++ b/src/coreclr/clr.featuredefines.props
@@ -13,7 +13,7 @@
     </PropertyGroup>
 
     <PropertyGroup Condition="'$(TargetsUnix)' == 'true'">
-        <FeatureXplatEventSource>true</FeatureXplatEventSource>
+        <FeatureXplatEventSource Condition="'$(TargetOS)'!='OSX'">true</FeatureXplatEventSource>
 
         <FeatureArrayStubAsIL>true</FeatureArrayStubAsIL>
         <FeatureMulticastStubAsIL>true</FeatureMulticastStubAsIL>
diff --git a/src/coreclr/clrdefinitions.cmake b/src/coreclr/clrdefinitions.cmake
index 99a4d61a1805d7..6025b0141746d5 100644
--- a/src/coreclr/clrdefinitions.cmake
+++ b/src/coreclr/clrdefinitions.cmake
@@ -120,9 +120,9 @@ endif(FEATURE_GDBJIT_LANGID_CS)
 if(FEATURE_GDBJIT_SYMTAB)
     add_definitions(-DFEATURE_GDBJIT_SYMTAB)
 endif(FEATURE_GDBJIT_SYMTAB)
-if(CLR_CMAKE_TARGET_UNIX)
+if(CLR_CMAKE_TARGET_LINUX)
     add_definitions(-DFEATURE_EVENTSOURCE_XPLAT)
-endif(CLR_CMAKE_TARGET_UNIX)
+endif(CLR_CMAKE_TARGET_LINUX)
 # NetBSD doesn't implement this feature
 if(NOT CLR_CMAKE_TARGET_NETBSD)
     add_definitions(-DFEATURE_HIJACK)