diff --git a/azure-pipelines-public.yml b/azure-pipelines-public.yml
index c42e450fb7e..e5d71520fdd 100644
--- a/azure-pipelines-public.yml
+++ b/azure-pipelines-public.yml
@@ -93,7 +93,7 @@ stages:
           - job: macOS
             enablePublishTestResults: true
             pool:
-              vmImage: macOS-13
+              vmImage: macOS-15
             variables:
               # Rely on task Arcade injects, not auto-injected build step.
               - skipComponentGovernanceDetection: true
@@ -151,7 +151,7 @@ stages:
               - name: _HelixBuildConfig
                 value: $(_BuildConfig)
               - name: HelixTargetQueues
-                value: Windows.10.Amd64.Open;OSX.13.ARM64.Open;Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-20.04-helix-sqlserver-amd64
+                value: Windows.10.Amd64.Open;OSX.15.ARM64.Open;Ubuntu.2204.Amd64.Open@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-20.04-helix-sqlserver-amd64
               - name: _HelixAccessToken
                 value: '' # Needed for public queues
             steps:
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 017dc6fadf5..f0c87f45726 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -140,7 +140,7 @@ extends:
           - job: macOS
             pool:
               name: Azure Pipelines
-              image: macOS-13
+              image: macOS-15
               os: macOS
             variables:
               # Rely on task Arcade injects, not auto-injected build step.
@@ -195,7 +195,7 @@ extends:
               - name: _HelixBuildConfig
                 value: $(_BuildConfig)
               - name: HelixTargetQueues
-                value: Windows.10.Amd64;OSX.13.ARM64;Ubuntu.2204.Amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-20.04-helix-sqlserver-amd64
+                value: Windows.10.Amd64;OSX.15.ARM64;Ubuntu.2204.Amd64@mcr.microsoft.com/dotnet-buildtools/prereqs:ubuntu-20.04-helix-sqlserver-amd64
               - name: _HelixAccessToken
                 # Needed for internal queues
                 value: $(HelixApiAccessToken)