diff --git a/.github/workflows/microsoft-build-rntester.yml b/.github/workflows/microsoft-build-rntester.yml
index 746fd235ca0267..92775bb9a78556 100644
--- a/.github/workflows/microsoft-build-rntester.yml
+++ b/.github/workflows/microsoft-build-rntester.yml
@@ -6,7 +6,7 @@ on:
 jobs:
   build-rntester:
     name: "${{ matrix.platform }}, ${{ matrix.arch }}, ${{ matrix.engine }}"
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 90
     strategy:
       fail-fast: false
diff --git a/.github/workflows/microsoft-react-native-test-app-integration.yml b/.github/workflows/microsoft-react-native-test-app-integration.yml
index 98c09568cdf48f..8725a42a9cd0b5 100644
--- a/.github/workflows/microsoft-react-native-test-app-integration.yml
+++ b/.github/workflows/microsoft-react-native-test-app-integration.yml
@@ -6,7 +6,7 @@ on:
 jobs:
   react-native-test-app-integration:
     name: "Test react-native-test-app integration"
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v4
diff --git a/.github/workflows/microsoft-test-react-native-macos-init.yml b/.github/workflows/microsoft-test-react-native-macos-init.yml
index 98bf62f681931d..923ffd7a17a933 100644
--- a/.github/workflows/microsoft-test-react-native-macos-init.yml
+++ b/.github/workflows/microsoft-test-react-native-macos-init.yml
@@ -6,7 +6,7 @@ on:
 jobs:
   test-react-native-macos-init:
     name: "Test react-native-macos init"
-    runs-on: macos-15
+    runs-on: macos-26
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v4