diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index ffbe650531..22cc056476 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -1102,9 +1102,6 @@ function(onnxruntime_set_compile_flags target_name)
       endif()
 
       target_compile_definitions(${target_name} PUBLIC -DNSYNC_ATOMIC_CPP11)
-      if(APPLE AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "iOSCross" AND NOT ${CMAKE_SYSTEM_NAME} MATCHES "iOS")
-        target_compile_definitions(${target_name} PUBLIC -Doptional_CONFIG_SELECT_OPTIONAL=optional_OPTIONAL_NONSTD)
-      endif()
       target_include_directories(${target_name} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/external/nsync/public")
     endif()
     foreach(ORT_FLAG ${ORT_PROVIDER_FLAGS})
diff --git a/tools/ci_build/github/azure-pipelines/mac-coreml-ci-pipeline.yml b/tools/ci_build/github/azure-pipelines/mac-coreml-ci-pipeline.yml
index acb7a2d1fc..3bba118068 100644
--- a/tools/ci_build/github/azure-pipelines/mac-coreml-ci-pipeline.yml
+++ b/tools/ci_build/github/azure-pipelines/mac-coreml-ci-pipeline.yml
@@ -3,7 +3,7 @@ jobs:
   pool:
     vmImage: 'macOS-10.15'
   variables:
-    MACOSX_DEPLOYMENT_TARGET: '10.13'
+    MACOSX_DEPLOYMENT_TARGET: '10.14'
   timeoutInMinutes: 120
   steps:
   - script: brew install coreutils ninja
diff --git a/tools/ci_build/github/azure-pipelines/mac-ios-ci-pipeline.yml b/tools/ci_build/github/azure-pipelines/mac-ios-ci-pipeline.yml
index 64acc42683..ff024c5f1e 100644
--- a/tools/ci_build/github/azure-pipelines/mac-ios-ci-pipeline.yml
+++ b/tools/ci_build/github/azure-pipelines/mac-ios-ci-pipeline.yml
@@ -3,7 +3,7 @@ jobs:
   pool:
     vmImage: 'macOS-10.15'
   variables:
-    MACOSX_DEPLOYMENT_TARGET: '10.13'
+    MACOSX_DEPLOYMENT_TARGET: '10.14'
   timeoutInMinutes: 120
   steps:
     - script: |
diff --git a/tools/ci_build/github/azure-pipelines/templates/c-api-cpu-no-java.yml b/tools/ci_build/github/azure-pipelines/templates/c-api-cpu-no-java.yml
index f4446f988f..202885a59c 100644
--- a/tools/ci_build/github/azure-pipelines/templates/c-api-cpu-no-java.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/c-api-cpu-no-java.yml
@@ -95,7 +95,7 @@ jobs:
   workspace:
     clean: all
   variables:
-    MACOSX_DEPLOYMENT_TARGET: '10.13'
+    MACOSX_DEPLOYMENT_TARGET: '10.14'
   pool: 
     vmImage: 'macOS-10.15'
   timeoutInMinutes:  120
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 3c5def19d4..764278047e 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
@@ -109,7 +109,7 @@ jobs:
   workspace:
     clean: all
   variables:
-    MACOSX_DEPLOYMENT_TARGET: '10.13'
+    MACOSX_DEPLOYMENT_TARGET: '10.14'
   pool:
     vmImage: 'macOS-10.15'
   timeoutInMinutes:  120
diff --git a/tools/ci_build/github/azure-pipelines/templates/mac-ci.yml b/tools/ci_build/github/azure-pipelines/templates/mac-ci.yml
index 5ebedf7e49..9d1ffe459b 100644
--- a/tools/ci_build/github/azure-pipelines/templates/mac-ci.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/mac-ci.yml
@@ -19,7 +19,7 @@ jobs:
   variables:
     BuildCommand: ${{ parameters.BuildCommand }}
     ALLOW_RELEASED_ONNX_OPSET_ONLY: ${{ parameters.AllowReleasedOpsetOnly }}
-    MACOSX_DEPLOYMENT_TARGET: '10.13'
+    MACOSX_DEPLOYMENT_TARGET: '10.14'
   steps:
     - checkout: self
       ${{ if ne(parameters.SubmoduleCheckoutMode, '') }}:
diff --git a/tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml b/tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml
index 5095fb39cd..61f287c156 100644
--- a/tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml
+++ b/tools/ci_build/github/azure-pipelines/templates/py-packaging-stage.yml
@@ -1002,7 +1002,7 @@ stages:
       pool:
         vmImage: 'macOS-10.15'
       variables:
-        MACOSX_DEPLOYMENT_TARGET: '10.13'
+        MACOSX_DEPLOYMENT_TARGET: '10.14'
       strategy:
         matrix:
           Python36: