diff --git a/.azure-pipelines/1ES.Build.yml b/.azure-pipelines/1ES.Build.yml
index 3aa2e3fc7..660e9bb88 100644
--- a/.azure-pipelines/1ES.Build.yml
+++ b/.azure-pipelines/1ES.Build.yml
@@ -87,10 +87,12 @@ extends:
             ESRPInfo: ${{ parameters.ESRPInfo }}
 
         # macOS uses a separate template because it runs on a different
-        # pool (Microsoft-hosted) and skips ESRP signing / cross-compile
-        # plumbing. The produced artifact name follows the same scheme
-        # (mxc-binaries-<triplet>) so Package_MXC_NPM_SDK can consume it.
+        # pool (Microsoft-hosted). The produced artifact name follows the same
+        # scheme (mxc-binaries-<triplet>) so Package_MXC_NPM_SDK can consume it.
         - template: .azure-pipelines/templates/Mac.Build.Job.yml@self
+          parameters:
+            isOfficialBuild: ${{ eq(parameters.officialBuild, 'Official') }}
+            ESRPInfo: ${{ parameters.ESRPInfo }}
 
     - stage: Package_MXC
       displayName: 'Package MXC'
diff --git a/.azure-pipelines/templates/Mac.Build.Job.yml b/.azure-pipelines/templates/Mac.Build.Job.yml
index fbb61ca11..ddbd53bd7 100644
--- a/.azure-pipelines/templates/Mac.Build.Job.yml
+++ b/.azure-pipelines/templates/Mac.Build.Job.yml
@@ -15,6 +15,12 @@ parameters:
 - name: triplet
   type: string
   default: aarch64-apple-darwin
+- name: isOfficialBuild
+  type: boolean
+  default: false
+- name: ESRPInfo
+  type: object
+  default: {}
 
 jobs:
 - job: 'build_arm64_MAC'
@@ -82,6 +88,83 @@ jobs:
       displayName: Run tests
       workingDirectory: $(workingDirectory)
 
+    # --- macOS Code Signing + Notarization (official builds only) ---
+    # ESRP handles the full signing flow using Microsoft's Developer ID
+    # certificate (CP-401337-Apple). No local cert or codesign needed.
+    #
+    # ESRP's Mac signing requires a .zip (or .dmg) input — raw Mach-O
+    # binaries are rejected. We zip before signing and unzip afterward.
+    #
+    # Flow: (1) zip → (2) ESRP sign (hardened runtime) → (3) ESRP notarize → (4) unzip
+    # Stapling is impossible for standalone Mach-O binaries (Apple limitation);
+    # Gatekeeper checks the notarization ticket online instead.
+    - script: |
+        cd "$(targetTripleDir)"
+        zip mxc-exec-mac.zip mxc-exec-mac
+      displayName: 'Zip binary for ESRP signing'
+      condition: and(succeeded(), eq(${{ parameters.isOfficialBuild }}, true))
+
+    - task: EsrpCodeSigning@5
+      displayName: 'Sign macOS binary (ESRP)'
+      condition: and(succeeded(), eq(${{ parameters.isOfficialBuild }}, true))
+      inputs:
+        ConnectedServiceName: ${{ parameters.ESRPInfo.serviceName }}
+        AppRegistrationClientId: ${{ parameters.ESRPInfo.clientId }}
+        AppRegistrationTenantId: ${{ parameters.ESRPInfo.tenantId }}
+        AuthAKVName: ${{ parameters.ESRPInfo.azureKeyVaultName }}
+        AuthCertName: ${{ parameters.ESRPInfo.authCertName }}
+        AuthSignCertName: ${{ parameters.ESRPInfo.signCertName }}
+        FolderPath: $(targetTripleDir)
+        Pattern: mxc-exec-mac.zip
+        UseMinimatch: true
+        signConfigType: 'inlineSignParams'
+        inlineOperation: >-
+          [
+            {
+              "KeyCode": "CP-401337-Apple",
+              "OperationCode": "MacAppDeveloperSign",
+              "Parameters": {
+                "Hardening": "--options=runtime"
+              },
+              "ToolName": "sign",
+              "ToolVersion": "1.0"
+            }
+          ]
+
+    - task: EsrpCodeSigning@5
+      displayName: 'Notarize macOS binary (ESRP)'
+      condition: and(succeeded(), eq(${{ parameters.isOfficialBuild }}, true))
+      inputs:
+        ConnectedServiceName: ${{ parameters.ESRPInfo.serviceName }}
+        AppRegistrationClientId: ${{ parameters.ESRPInfo.clientId }}
+        AppRegistrationTenantId: ${{ parameters.ESRPInfo.tenantId }}
+        AuthAKVName: ${{ parameters.ESRPInfo.azureKeyVaultName }}
+        AuthCertName: ${{ parameters.ESRPInfo.authCertName }}
+        AuthSignCertName: ${{ parameters.ESRPInfo.signCertName }}
+        FolderPath: $(targetTripleDir)
+        Pattern: mxc-exec-mac.zip
+        UseMinimatch: true
+        signConfigType: 'inlineSignParams'
+        inlineOperation: >-
+          [
+            {
+              "KeyCode": "CP-401337-Apple",
+              "OperationCode": "MacAppNotarize",
+              "Parameters": {
+                "BundleId": "com.microsoft.mxc"
+              },
+              "ToolName": "sign",
+              "ToolVersion": "1.0"
+            }
+          ]
+
+    - script: |
+        cd "$(targetTripleDir)"
+        unzip -o mxc-exec-mac.zip
+        rm mxc-exec-mac.zip
+      displayName: 'Unzip signed binary'
+      condition: and(succeeded(), eq(${{ parameters.isOfficialBuild }}, true))
+
     - task: CopyFiles@2
       displayName: Copy binary
       inputs: