diff --git a/decoded_output.xml b/decoded_output.xml
new file mode 100644
index 000000000..e69de29bb
diff --git a/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppRunnerBase.cs b/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppRunnerBase.cs
index e2e94d048..41187e4d6 100644
--- a/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppRunnerBase.cs
+++ b/src/Microsoft.DotNet.XHarness.Apple/AppOperations/AppRunnerBase.cs
@@ -178,9 +178,14 @@ protected async Task<ProcessExecutionResult> RunSimulatorApp(
 
         _mainLog.WriteLine("Launching the app");
 
+        // Create an application log to capture mlaunch output (including simctl launch --console output)
+        // This is needed for exit code detection, as the app exit code (e.g., DOTNET.APP_EXIT_CODE)
+        // is printed to stdout by the simulator and captured by mlaunch
+        var appOutputLog = _logs.Create(appInformation.BundleIdentifier + ".log", LogType.ApplicationLog.ToString(), timestamp: true);
+
         if (waitForExit)
         {
-            var result = await _processManager.ExecuteCommandAsync(mlaunchArguments, _mainLog, timeout, cancellationToken: cancellationToken);
+            var result = await _processManager.ExecuteCommandAsync(mlaunchArguments, _mainLog, appOutputLog, appOutputLog, timeout, cancellationToken: cancellationToken);
             simulatorScanToken?.Cancel();
             return result;
         }
@@ -194,7 +199,7 @@ protected async Task<ProcessExecutionResult> RunSimulatorApp(
 
         _mainLog.WriteLine("Waiting for the app to launch..");
 
-        var runTask = _processManager.ExecuteCommandAsync(mlaunchArguments, Log.CreateAggregatedLog(_mainLog, scanLog), timeout, cancellationToken: cancellationToken);
+        var runTask = _processManager.ExecuteCommandAsync(mlaunchArguments, Log.CreateAggregatedLog(_mainLog, scanLog), appOutputLog, appOutputLog, timeout, cancellationToken: cancellationToken);
         await Task.WhenAny(runTask, appLaunched.Task);
 
         if (!appLaunched.Task.IsCompleted)
diff --git a/src/Microsoft.DotNet.XHarness.iOS.Shared/Hardware/SimulatorSelector.cs b/src/Microsoft.DotNet.XHarness.iOS.Shared/Hardware/SimulatorSelector.cs
index dfe7a78d4..50a5e760f 100644
--- a/src/Microsoft.DotNet.XHarness.iOS.Shared/Hardware/SimulatorSelector.cs
+++ b/src/Microsoft.DotNet.XHarness.iOS.Shared/Hardware/SimulatorSelector.cs
@@ -36,9 +36,9 @@ public virtual string GetDeviceType(TestTargetOs target, bool minVersion)
     {
         return target.Platform switch
         {
-            TestTarget.Simulator_iOS64 => "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "iPhone-6s" : "iPhone-XS"),
+            TestTarget.Simulator_iOS64 => "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "iPhone-6s" : "iPhone-11-Pro"),
             TestTarget.Simulator_tvOS => "com.apple.CoreSimulator.SimDeviceType.Apple-TV-1080p",
-            TestTarget.Simulator_watchOS => "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "Apple-Watch-38mm" : "Apple-Watch-Series-3-38mm"),
+            TestTarget.Simulator_watchOS => "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "Apple-Watch-38mm" : "Apple-Watch-Series-5-40mm"),
             TestTarget.Simulator_xrOS => "com.apple.CoreSimulator.SimDeviceType.Apple-Vision-Pro",
             _ => throw new Exception(string.Format("Invalid simulator target: {0}", target))
         };
@@ -49,7 +49,7 @@ public virtual void GetCompanionRuntimeAndDeviceType(TestTargetOs target, bool m
         if (target.Platform == TestTarget.Simulator_watchOS)
         {
             companionRuntime = "com.apple.CoreSimulator.SimRuntime.iOS-" + (minVersion ? SdkVersions.MinWatchOSCompanionSimulator : SdkVersions.MaxWatchOSCompanionSimulator).Replace('.', '-');
-            companionDeviceType = "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "iPhone-6s" : "iPhone-XS");
+            companionDeviceType = "com.apple.CoreSimulator.SimDeviceType." + (minVersion ? "iPhone-6s" : "iPhone-11-Pro");
         }
         else
         {
diff --git a/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppRunnerTests.cs b/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppRunnerTests.cs
index 578be6a6f..a33a28c7a 100644
--- a/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppRunnerTests.cs
+++ b/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppRunnerTests.cs
@@ -69,6 +69,8 @@ public async Task RunOnSimulatorTest()
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
@@ -431,11 +433,13 @@ public async Task RunOnSimulatorNoWaitTest()
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
                    It.IsAny<CancellationToken>()))
-            .Callback((MlaunchArguments args, ILog log, TimeSpan timeout, Dictionary<string, string> env, int verbosity, CancellationToken? ct) =>
+            .Callback((MlaunchArguments args, ILog log, ILog stdoutLog, ILog stderrLog, TimeSpan timeout, Dictionary<string, string> env, int verbosity, CancellationToken? ct) =>
             {
                 appLog = log;
                 appLaunchedTask.SetResult();
@@ -485,6 +489,8 @@ public async Task RunOnSimulatorNoWaitTest()
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
@@ -534,11 +540,13 @@ public async Task RunOnSimulatorNoWaitNoLaunchSignalTest()
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
                    It.IsAny<CancellationToken>()))
-            .Callback((MlaunchArguments args, ILog log, TimeSpan timeout, Dictionary<string, string> env, int verbosity, CancellationToken? ct) =>
+            .Callback((MlaunchArguments args, ILog log, ILog stdoutLog, ILog stderrLog, TimeSpan timeout, Dictionary<string, string> env, int verbosity, CancellationToken? ct) =>
             {
                 appLaunchedTask.SetResult();
             })
@@ -589,6 +597,8 @@ public async Task RunOnSimulatorNoWaitNoLaunchSignalTest()
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
diff --git a/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppTesterTests.cs b/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppTesterTests.cs
index 31990ae00..e3c937585 100644
--- a/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppTesterTests.cs
+++ b/tests/Microsoft.DotNet.XHarness.Apple.Tests/AppOperations/AppTesterTests.cs
@@ -129,6 +129,8 @@ public async Task TestOnSimulatorTest(bool useTunnel)
                 x => x.ExecuteCommandAsync(
                    It.Is<MlaunchArguments>(args => args.AsCommandLine() == expectedArgs),
                    _mainLog.Object,
+                   It.IsAny<ILog>(),
+                   It.IsAny<ILog>(),
                    It.IsAny<TimeSpan>(),
                    It.IsAny<Dictionary<string, string>>(),
                    It.IsAny<int>(),
diff --git a/tests/integration-tests/Apple/Device.iOS.Tests.proj b/tests/integration-tests/Apple/Device.iOS.Tests.proj
index 268b618d7..928e2b23c 100644
--- a/tests/integration-tests/Apple/Device.iOS.Tests.proj
+++ b/tests/integration-tests/Apple/Device.iOS.Tests.proj
@@ -5,12 +5,12 @@
 
     <!-- apple test / ios-device -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=ios-device;TestAppBundleName=System.Buffers.Tests.app</AdditionalProperties>
+      <AdditionalProperties>TestTarget=ios-device;TestArch=arm64;TestAppBundleName=System.Buffers.Tests.app</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple run / ios-device -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=ios-device;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
+      <AdditionalProperties>TestTarget=ios-device;TestArch=arm64;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
     </XHarnessAppleProject>
   </ItemGroup>
 
diff --git a/tests/integration-tests/Apple/Device.tvOS.Tests.proj b/tests/integration-tests/Apple/Device.tvOS.Tests.proj
index f122a0fd9..ac20f2d9b 100644
--- a/tests/integration-tests/Apple/Device.tvOS.Tests.proj
+++ b/tests/integration-tests/Apple/Device.tvOS.Tests.proj
@@ -5,12 +5,12 @@
 
     <!-- apple test / tvos-device -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=tvos-device;TestAppBundleName=System.Buffers.Tests.app</AdditionalProperties>
+      <AdditionalProperties>TestTarget=tvos-device;TestArch=arm64;TestAppBundleName=System.Buffers.Tests.app</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple run / tvos-device -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=tvos-device;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
+      <AdditionalProperties>TestTarget=tvos-device;TestArch=arm64;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
     </XHarnessAppleProject>
   </ItemGroup>
 
diff --git a/tests/integration-tests/Apple/Simulator.Tests.proj b/tests/integration-tests/Apple/Simulator.Tests.proj
index 087d1f92d..e9dea7650 100644
--- a/tests/integration-tests/Apple/Simulator.Tests.proj
+++ b/tests/integration-tests/Apple/Simulator.Tests.proj
@@ -1,32 +1,45 @@
 <Project Sdk="Microsoft.DotNet.Helix.Sdk">
 
+  <!-- Detect architecture from Helix target queue name -->
+  <PropertyGroup>
+    <IsArm64Queue>$(HelixTargetQueue.Contains('arm64'))</IsArm64Queue>
+    <IsAmd64Queue>$(HelixTargetQueue.Contains('amd64'))</IsAmd64Queue>
+    <TestArch Condition="'$(IsArm64Queue)' == 'true'">arm64</TestArch>
+    <TestArch Condition="'$(IsAmd64Queue)' == 'true'">x64</TestArch>
+  </PropertyGroup>
+
+  <Target Name="ValidateArchitecture" BeforeTargets="Build">
+    <Error Condition="'$(HelixTargetQueue)' != '' and '$(IsArm64Queue)' != 'true' and '$(IsAmd64Queue)' != 'true'"
+           Text="Unable to detect architecture from HelixTargetQueue '$(HelixTargetQueue)'. Queue name must contain 'arm64' or 'amd64'." />
+  </Target>
+
   <ItemGroup>
     <HelixTargetQueue Include="osx.15.amd64.open"/>
-    <HelixTargetQueue Include="osx.14.arm64.open"/>
+    <HelixTargetQueue Include="osx.26.arm64.open"/>
 
     <!-- apple test / ios-simulator-64 -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=ios-simulator-64;TestAppBundleName=System.Numerics.Vectors.Tests.app</AdditionalProperties>
+      <AdditionalProperties>TestTarget=ios-simulator-64;TestArch=$(TestArch);TestAppBundleName=System.Numerics.Vectors.Tests.app</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple run / ios-simlator-64 -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=ios-simulator-64;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
+      <AdditionalProperties>TestTarget=ios-simulator-64;TestArch=$(TestArch);TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple test / maccatalyst -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=maccatalyst;TestAppBundleName=System.Collections.NonGeneric.Tests.app</AdditionalProperties>
+      <AdditionalProperties>TestTarget=maccatalyst;TestArch=$(TestArch);TestAppBundleName=System.Collections.NonGeneric.Tests.app</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple run / maccatalyst -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=maccatalyst;TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
+      <AdditionalProperties>TestTarget=maccatalyst;TestArch=$(TestArch);TestAppBundleName=iOS.Simulator.PInvoke.Test.app;IncludesTestRunner=false;ExpectedExitCode=42</AdditionalProperties>
     </XHarnessAppleProject>
 
     <!-- apple test / tvos-simulator -->
     <XHarnessAppleProject Include="TestAppBundle.proj">
-      <AdditionalProperties>TestTarget=tvos-simulator;TestAppBundleName=Microsoft.Extensions.Configuration.Ini.Tests.app</AdditionalProperties>
+      <AdditionalProperties>TestTarget=tvos-simulator;TestArch=$(TestArch);TestAppBundleName=Microsoft.Extensions.Configuration.Ini.Tests.app</AdditionalProperties>
     </XHarnessAppleProject>
   </ItemGroup>
 
diff --git a/tests/integration-tests/Apple/TestAppBundle.proj b/tests/integration-tests/Apple/TestAppBundle.proj
index c28668355..2674d64f0 100644
--- a/tests/integration-tests/Apple/TestAppBundle.proj
+++ b/tests/integration-tests/Apple/TestAppBundle.proj
@@ -13,9 +13,9 @@
   <Import Project="../Storage.props"/>
 
   <PropertyGroup>
-    <AppStorageUrl>$(AssetsBaseUri)/ios/test-app-new/$(TestTarget)</AppStorageUrl>
+    <AppStorageUrl>$(AssetsBaseUri)/ios/test-app-new/$(TestTarget)/$(TestArch)</AppStorageUrl>
     <XHarnessTestAppBundleUrl>$(AppStorageUrl)/$(TestAppBundleName).zip</XHarnessTestAppBundleUrl>
-    <TestAppDestinationDir>$(ArtifactsTmpDir)test-app-new\$(TestTarget)</TestAppDestinationDir>
+    <TestAppDestinationDir>$(ArtifactsTmpDir)test-app-new\$(TestTarget)\$(TestArch)</TestAppDestinationDir>
   </PropertyGroup>
 
   <Target Name="Build" Returns="@(XHarnessAppFoldersToTest)">
@@ -23,6 +23,10 @@
       <Output TaskParameter="DownloadedFile" ItemName="ZippedAppBundle" />
     </DownloadFile>
 
+    <!--
+      The test apps have .zip extension but are actually tar.gz files. When updating the apps, make sure to compress them using tar.
+      E.g.: COPYFILE_DISABLE=1 tar - -no-xattrs - -no-acls - -no-mac-metadata -czf <TestAppBundleName>.zip <TestAppBundleName> (remove spaces - -)
+    -->
     <Message Text="Downloaded $(TestAppBundleName) from @(ZippedAppBundle). Extracting..." Importance="High" />
     <Exec Command="tar -xzf @(ZippedAppBundle) -C $(TestAppDestinationDir)" />
     <Message Text="Extracted to $(TestAppDestinationDir)" Importance="High" />