diff --git a/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj b/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
index 9b3b252..49290f1 100644
--- a/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
+++ b/GrasshopperAsyncComponent/GrasshopperAsyncComponent.csproj
@@ -77,8 +77,11 @@
   <Target Name="AfterBuild">
   </Target>
   -->
-  <PropertyGroup>
+  <PropertyGroup Condition="$([MSBuild]::IsOsPlatform('Windows'))">
     <PostBuildEvent>Copy "$(TargetPath)" "$(TargetDir)$(ProjectName).gha"</PostBuildEvent>
+  </PropertyGroup>
+    <PropertyGroup Condition="$([MSBuild]::IsOsPlatform('OSX'))">
+    <PostBuildEvent>cp "$(TargetPath)" "$(TargetDir)$(ProjectName).gha"</PostBuildEvent>
   </PropertyGroup>
   <PropertyGroup>
     <FallbackCulture>en-US</FallbackCulture>