diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs b/csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs
index fea145b018..5747cf9114 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/NativeMethods.shared.cs
@@ -814,17 +814,14 @@ namespace Microsoft.ML.OnnxRuntime
         [DllImport(NativeLib.DllName, CharSet = CharSet.Ansi)]
         public static extern IntPtr /*(OrtStatus*)*/ OrtSessionOptionsAppendExecutionProvider_CPU(IntPtr /*(OrtSessionOptions*) */ options, int use_arena);
 
-#if __MOBILE__
 #if __ANDROID__
         [DllImport(NativeLib.DllName, CharSet = CharSet.Ansi)]
         public static extern IntPtr /*(OrtStatus*)*/ OrtSessionOptionsAppendExecutionProvider_Nnapi(IntPtr /*(OrtSessionOptions*)*/ options, uint nnapi_flags);
-#endif
-
-#if __IOS__
+#else
+        // CoreML is available on iOS and macOS so we can't exclude based on __MOBILE__ && __IOS__
         [DllImport(NativeLib.DllName, CharSet = CharSet.Ansi)]
         public static extern IntPtr /*(OrtStatus*)*/ OrtSessionOptionsAppendExecutionProvider_CoreML(IntPtr /*(OrtSessionOptions*)*/ options, uint coreml_flags);
-#endif
-#else
+
         // on non-mobile platforms any of these EPs are possible
         [DllImport(NativeLib.DllName, CharSet = CharSet.Ansi)]
         public static extern IntPtr /*(OrtStatus*)*/ OrtSessionOptionsAppendExecutionProvider_Dnnl(IntPtr /*(OrtSessionOptions*) */ options, int use_arena);
diff --git a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
index 1a076dc686..5c131d17ba 100644
--- a/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
+++ b/csharp/src/Microsoft.ML.OnnxRuntime/SessionOptions.shared.cs
@@ -336,7 +336,18 @@ namespace Microsoft.ML.OnnxRuntime
             NativeApiStatus.VerifySuccess(
                 NativeMethods.OrtSessionOptionsAppendExecutionProvider_CoreML(handle, (uint)coremlFlags));
 #else
-            throw new NotSupportedException("The CoreML Execution Provider is not supported in this build");
+#if !__ANDROID__
+            // the CoreML EP entry point is registered unless this is Android but is only valid if this is OSX
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+            {
+                NativeApiStatus.VerifySuccess(
+                    NativeMethods.OrtSessionOptionsAppendExecutionProvider_CoreML(handle, (uint)coremlFlags));
+            }
+            else
+#endif
+            {
+                throw new NotSupportedException("The CoreML Execution Provider is not supported in this build");
+            }
 #endif
         }
 
@@ -739,11 +750,11 @@ namespace Microsoft.ML.OnnxRuntime
         }
         private ExecutionMode _executionMode = ExecutionMode.ORT_SEQUENTIAL;
 
-        #endregion
+#endregion
 
-        #region Private Methods
+#region Private Methods
 
-#if! __MOBILE__
+#if !__MOBILE__
         // Declared, but called only if OS = Windows.
         [DllImport("kernel32.dll")]
         private static extern IntPtr LoadLibrary(string dllToLoad);
diff --git a/tools/ci_build/github/azure-pipelines/templates/c-api-cpu.yml b/tools/ci_build/github/azure-pipelines/templates/c-api-cpu.yml
index cb1451ad69..50b8e93648 100644
--- a/tools/ci_build/github/azure-pipelines/templates/c-api-cpu.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/c-api-cpu.yml
@@ -148,21 +148,21 @@ jobs:
 
     - template: mac-packaging.yml
       parameters :
-        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }} --build_java --build_nodejs --cmake_extra_defines CMAKE_OSX_ARCHITECTURES=arm64
+        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }} --build_java --build_nodejs --use_coreml --cmake_extra_defines CMAKE_OSX_ARCHITECTURES=arm64
         MacosArch: arm64
         BuildJava: true
         BuildNodejs: true
 
     - template: mac-packaging.yml
       parameters :
-        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }} --cmake_extra_defines CMAKE_OSX_ARCHITECTURES="arm64;x86_64"
+        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }}  --use_coreml --cmake_extra_defines CMAKE_OSX_ARCHITECTURES="arm64;x86_64"
         MacosArch: universal2
         BuildJava: false
         BuildNodejs: false
 
     - template: mac-packaging.yml
       parameters :
-        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }} --build_java --build_nodejs
+        AdditionalBuildFlags : ${{ parameters.AdditionalBuildFlags }} --build_java --build_nodejs  --use_coreml
         MacosArch: x86_64
         BuildJava: true
         BuildNodejs: true
diff --git a/tools/ci_build/github/linux/copy_strip_binary.sh b/tools/ci_build/github/linux/copy_strip_binary.sh
index f64e975a48..e9e8ef4b34 100755
--- a/tools/ci_build/github/linux/copy_strip_binary.sh
+++ b/tools/ci_build/github/linux/copy_strip_binary.sh
@@ -35,6 +35,8 @@ then
     dsymutil $BINARY_DIR/$ARTIFACT_NAME/lib/$LIB_NAME -o $BINARY_DIR/$ARTIFACT_NAME/lib/$LIB_NAME.dSYM
     strip -S $BINARY_DIR/$ARTIFACT_NAME/lib/$LIB_NAME
     ln -s $LIB_NAME $BINARY_DIR/$ARTIFACT_NAME/lib/libonnxruntime.dylib
+    # copy the CoreML EP header for macOS build (libs with .dylib ext)
+    cp $SOURCE_DIR/onnxruntime/core/providers/coreml/coreml_execution_provider.h  $BINARY_DIR/$ARTIFACT_NAME/include
 elif [[ $LIB_NAME == *.so.* ]]
 then
     ln -s $LIB_NAME $BINARY_DIR/$ARTIFACT_NAME/lib/libonnxruntime.so