diff --git a/src/EditorFeatures/Core.Cocoa/Microsoft.CodeAnalysis.EditorFeatures.Cocoa.csproj b/src/EditorFeatures/Core.Cocoa/Microsoft.CodeAnalysis.EditorFeatures.Cocoa.csproj
index 79e60f46f0b2d..58493eefb7b63 100644
--- a/src/EditorFeatures/Core.Cocoa/Microsoft.CodeAnalysis.EditorFeatures.Cocoa.csproj
+++ b/src/EditorFeatures/Core.Cocoa/Microsoft.CodeAnalysis.EditorFeatures.Cocoa.csproj
@@ -39,4 +39,9 @@
     <PublicAPI Include="PublicAPI.Shipped.txt" />
     <PublicAPI Include="PublicAPI.Unshipped.txt" />
   </ItemGroup>
+  <ItemGroup>
+    <!-- VS Mac has its own ExternalAccess.FSharp -->
+    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.FSharp" />
+    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.FSharp.UnitTests" />
+  </ItemGroup>
 </Project>
\ No newline at end of file