diff --git a/objectivec/error_utils.mm b/objectivec/error_utils.mm
index 335cf88..e8d4d5b 100644
--- a/objectivec/error_utils.mm
+++ b/objectivec/error_utils.mm
@@ -11,7 +11,7 @@ void ORTSaveCodeAndDescriptionToError(int code, const char* descriptionCstr, NSE
   if (!error) return;
 
   NSString* description = [NSString stringWithCString:descriptionCstr
-                                             encoding:NSASCIIStringEncoding];
+                                             encoding:NSUTF8StringEncoding];
 
   *error = [NSError errorWithDomain:kOrtErrorDomain
                                code:code
diff --git a/objectivec/include/ort_coreml_execution_provider.h b/objectivec/include/ort_coreml_execution_provider.h
index d7d873f..41d15aa 100644
--- a/objectivec/include/ort_coreml_execution_provider.h
+++ b/objectivec/include/ort_coreml_execution_provider.h
@@ -70,7 +70,22 @@ NS_ASSUME_NONNULL_BEGIN
  */
 - (BOOL)appendCoreMLExecutionProviderWithOptions:(ORTCoreMLExecutionProviderOptions*)options
                                            error:(NSError**)error;
-
+/**
+ * Enables the CoreML execution provider in the session configuration options.
+ * It is appended to the execution provider list which is ordered by
+ * decreasing priority.
+ *
+ * @param provider_options The CoreML execution provider options in dict.
+ *  available keys-values: more detail in core/providers/coreml/coreml_execution_provider.h
+ *      kCoremlProviderOption_MLComputeUnits: one of "CPUAndNeuralEngine", "CPUAndGPU", "CPUOnly", "All"
+ *      kCoremlProviderOption_ModelFormat: one of "MLProgram", "NeuralNetwork"
+ *      kCoremlProviderOption_RequireStaticInputShapes: "1" or "0"
+ *      kCoremlProviderOption_EnableOnSubgraphs: "1" or "0"
+ * @param error Optional error information set if an error occurs.
+ * @return Whether the provider was enabled successfully.
+ */
+- (BOOL)appendCoreMLExecutionProviderWithOptionsV2:(NSDictionary*)provider_options
+                                             error:(NSError**)error;
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/objectivec/include/ort_enums.h b/objectivec/include/ort_enums.h
index 78de233..61a127f 100644
--- a/objectivec/include/ort_enums.h
+++ b/objectivec/include/ort_enums.h
@@ -50,6 +50,7 @@ typedef NS_ENUM(int32_t, ORTGraphOptimizationLevel) {
   ORTGraphOptimizationLevelNone,
   ORTGraphOptimizationLevelBasic,
   ORTGraphOptimizationLevelExtended,
+  ORTGraphOptimizationLevelLayout,
   ORTGraphOptimizationLevelAll,
 };
 
diff --git a/objectivec/ort_coreml_execution_provider.mm b/objectivec/ort_coreml_execution_provider.mm
index 6cb5026..0c790a9 100644
--- a/objectivec/ort_coreml_execution_provider.mm
+++ b/objectivec/ort_coreml_execution_provider.mm
@@ -43,6 +43,21 @@ BOOL ORTIsCoreMLExecutionProviderAvailable() {
 #endif
 }
 
+- (BOOL)appendCoreMLExecutionProviderWithOptionsV2:(NSDictionary*)provider_options
+                                             error:(NSError**)error {
+#if ORT_OBJC_API_COREML_EP_AVAILABLE
+  try {
+    return [self appendExecutionProvider:@"CoreML" providerOptions:provider_options error:error];
+  }
+  ORT_OBJC_API_IMPL_CATCH_RETURNING_BOOL(error);
+
+#else  // !ORT_OBJC_API_COREML_EP_AVAILABLE
+  static_cast<void>(provider_options);
+  ORTSaveCodeAndDescriptionToError(ORT_FAIL, "CoreML execution provider is not enabled.", error);
+  return NO;
+#endif
+}
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/objectivec/ort_enums.mm b/objectivec/ort_enums.mm
index 6093981..5fcbe34 100644
--- a/objectivec/ort_enums.mm
+++ b/objectivec/ort_enums.mm
@@ -68,6 +68,7 @@ constexpr GraphOptimizationLevelInfo kGraphOptimizationLevelInfos[]{
     {ORTGraphOptimizationLevelNone, ORT_DISABLE_ALL},
     {ORTGraphOptimizationLevelBasic, ORT_ENABLE_BASIC},
     {ORTGraphOptimizationLevelExtended, ORT_ENABLE_EXTENDED},
+    {ORTGraphOptimizationLevelLayout, ORT_ENABLE_LAYOUT},
     {ORTGraphOptimizationLevelAll, ORT_ENABLE_ALL},
 };
 
diff --git a/objectivec/test/ort_session_test.mm b/objectivec/test/ort_session_test.mm
index 508289f..409ee7e 100644
--- a/objectivec/test/ort_session_test.mm
+++ b/objectivec/test/ort_session_test.mm
@@ -223,6 +223,28 @@ NS_ASSUME_NONNULL_BEGIN
   ORTAssertNullableResultSuccessful(session, err);
 }
 
+- (void)testAppendCoreMLEP_v2 {
+  NSError* err = nil;
+  ORTSessionOptions* sessionOptions = [ORTSessionTest makeSessionOptions];
+  NSDictionary* provider_options = @{@"EnableOnSubgraphs" : @"1"};  // set an arbitrary option
+
+  BOOL appendResult = [sessionOptions appendCoreMLExecutionProviderWithOptionsV2:provider_options
+                                                                           error:&err];
+
+  if (!ORTIsCoreMLExecutionProviderAvailable()) {
+    ORTAssertBoolResultUnsuccessful(appendResult, err);
+    return;
+  }
+
+  ORTAssertBoolResultSuccessful(appendResult, err);
+
+  ORTSession* session = [[ORTSession alloc] initWithEnv:self.ortEnv
+                                              modelPath:[ORTSessionTest getAddModelPath]
+                                         sessionOptions:sessionOptions
+                                                  error:&err];
+  ORTAssertNullableResultSuccessful(session, err);
+}
+
 - (void)testAppendXnnpackEP {
   NSError* err = nil;
   ORTSessionOptions* sessionOptions = [ORTSessionTest makeSessionOptions];
diff --git a/objectivec/test/testdata/gen_models.sh b/objectivec/test/testdata/gen_models.sh
old mode 100644
new mode 100755