diff --git a/.config/dotnet-tools.json b/.config/dotnet-tools.json
index a70fb055cdf..d10ef3d8870 100644
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -21,7 +21,7 @@
       ]
     },
     "microsoft.dotnet.xharness.cli": {
-      "version": "1.0.0-prerelease.22124.1",
+      "version": "1.0.0-prerelease.22204.2",
       "commands": [
         "xharness"
       ]
diff --git a/cake/UtilsManaged.cake b/cake/UtilsManaged.cake
index f6f069c862c..474ad5f01d2 100644
--- a/cake/UtilsManaged.cake
+++ b/cake/UtilsManaged.cake
@@ -308,11 +308,6 @@ async Task DownloadPackageAsync(string id, DirectoryPath outputDirectory)
 
         Information($"Downloading '{currentId}' version '{currentVersion}'...");
 
-        if (currentId == "_nativeassets.maccatalyst") {
-            Warning($"Skipping '{currentId}' because we do not yet have this package working...");
-            return;
-        }
-
         var root = await comparer.ExtractCachedPackageAsync(currentId, currentVersion);
         var toolsDir = $"{root}/tools/";
         if (DirectoryExists(toolsDir)) {
diff --git a/scripts/azure-pipelines-tests.yml b/scripts/azure-pipelines-tests.yml
index 3265a46ab06..051d82d2ea0 100644
--- a/scripts/azure-pipelines-tests.yml
+++ b/scripts/azure-pipelines-tests.yml
@@ -16,7 +16,7 @@ parameters:
     type: object
     default:
       name: Azure Pipelines
-      vmImage: macOS-10.15
+      vmImage: macos-11
   - name: VM_IMAGE_LINUX
     type: object
     default:
@@ -44,5 +44,8 @@ stages:
       isBuildPipeline: false
       buildExternals: ${{ parameters.buildExternals }}
       VM_IMAGE_WINDOWS: ${{ parameters.VM_IMAGE_WINDOWS }}
+      VM_IMAGE_WINDOWS_NATIVE: ${{ parameters.VM_IMAGE_WINDOWS }}
       VM_IMAGE_MAC: ${{ parameters.VM_IMAGE_MAC }}
+      VM_IMAGE_MAC_NATIVE: ${{ parameters.VM_IMAGE_MAC }}
       VM_IMAGE_LINUX: ${{ parameters.VM_IMAGE_LINUX }}
+      VM_IMAGE_LINUX_NATIVE: ${{ parameters.VM_IMAGE_LINUX }}
diff --git a/scripts/azure-pipelines-variables.yml b/scripts/azure-pipelines-variables.yml
index 4a9e5ab0455..7bc48b491ee 100644
--- a/scripts/azure-pipelines-variables.yml
+++ b/scripts/azure-pipelines-variables.yml
@@ -10,11 +10,12 @@ variables:
   BUILD_NUMBER: $[counter(format('_{0}_{1}_{2}__', variables['SKIASHARP_VERSION'], variables['Build.SourceBranch'], variables['PREVIEW_LABEL']), 1)]
   TIZEN_LINUX_PACKAGES: libxcb-xfixes0 libxcb-render-util0 libwebkitgtk-1.0-0 libxcb-image0 acl libsdl1.2debian libv4l-0 libxcb-randr0 libxcb-shape0 libxcb-icccm4 libsm6 gettext rpm2cpio cpio bridge-utils openvpn
   MANAGED_LINUX_PACKAGES: ttf-ancient-fonts ninja-build
-  MONO_VERSION_MACOS: '6_12_7'
+  MONO_VERSION_MACOS: '6_12_13'
   MONO_VERSION_LINUX: ''
-  XCODE_VERSION: 12.4
-  DOTNET_VERSION_PREVIOUS: 3.1.416
-  DOTNET_VERSION: 5.0.405
+  XCODE_VERSION: 13.2.1
+  XCODE_VERSION_NATIVE: 13.2.1
+  DOTNET_VERSION_PREVIOUS: 3.1.417
+  DOTNET_VERSION: 5.0.406
   DOTNET_VERSION_PREVIEW: '6.0.200-rtm.22107.3'
   DOTNET_WORKLOAD_SOURCE: 'https://aka.ms/dotnet/maui/6.0.200/preview.14.json'
   CONFIGURATION: 'Release'
diff --git a/scripts/azure-pipelines.yml b/scripts/azure-pipelines.yml
index d84bb40ca23..dfa965324df 100644
--- a/scripts/azure-pipelines.yml
+++ b/scripts/azure-pipelines.yml
@@ -22,7 +22,7 @@ parameters:
     type: object
     default:
       name: Azure Pipelines
-      vmImage: macOS-10.15
+      vmImage: macos-11
   - name: VM_IMAGE_LINUX
     type: object
     default:
@@ -46,5 +46,8 @@ stages:
       isBuildPipeline: true
       buildExternals: ${{ parameters.buildExternals }}
       VM_IMAGE_WINDOWS: ${{ parameters.VM_IMAGE_WINDOWS }}
+      VM_IMAGE_WINDOWS_NATIVE: ${{ parameters.VM_IMAGE_WINDOWS }}
       VM_IMAGE_MAC: ${{ parameters.VM_IMAGE_MAC }}
+      VM_IMAGE_MAC_NATIVE: ${{ parameters.VM_IMAGE_MAC }}
       VM_IMAGE_LINUX: ${{ parameters.VM_IMAGE_LINUX }}
+      VM_IMAGE_LINUX_NATIVE: ${{ parameters.VM_IMAGE_LINUX }}
diff --git a/scripts/azure-templates-build.yml b/scripts/azure-templates-build.yml
index 7463a5bfd42..13ea6985c6c 100644
--- a/scripts/azure-templates-build.yml
+++ b/scripts/azure-templates-build.yml
@@ -54,14 +54,14 @@ jobs:
             sudo apt update
             sudo apt install -y ${{ parameters.packages }}
           displayName: Install additional package dependencies
-          condition: ne('${{ parameters.packages }}', '')
+          condition: and(succeeded(), ne('${{ parameters.packages }}', ''))
 
       # make sure mono/msbuild is the correct version
       - ${{ if and(ne(variables['MONO_VERSION_LINUX'], ''), eq(parameters.docker, ''), endsWith(parameters.name, '_linux')) }}:
         - bash: ./scripts/install-mono.sh $(MONO_VERSION_LINUX)
           displayName: Install Mono and MSBuild
       - ${{ if endsWith(parameters.name, '_macos') }}:
-        - bash: sudo $(Agent.HomeDirectory)/scripts/select-xamarin-sdk.sh $(MONO_VERSION_MACOS)
+        - bash: sudo ./scripts/select-xamarin.sh $(MONO_VERSION_MACOS)
           displayName: Switch to the latest Xamarin SDK
 
       # install extra bits for the native builds
@@ -114,46 +114,58 @@ jobs:
             displayName: Install Android API 31 (v12)
         # install the bits needed for .NET
         - ${{ if eq(parameters.installDotNet, 'true') }}:
+          - ${{ if endsWith(parameters.name, '_macos') }}:
+            - pwsh: Remove-Item "$env:AGENT_TOOLSDIRECTORY/dotnet" -Recurse -Force -ErrorAction SilentlyContinue
+              displayName: Cleanup existing versions of .NET Core
           - task: UseDotNet@2
             inputs:
               packageType: 'sdk'
               version: $(DOTNET_VERSION_PREVIOUS)
-              performMultiLevelLookup: true
             displayName: Install the previous version of .NET Core
           - task: UseDotNet@2
             inputs:
               packageType: 'sdk'
               version: $(DOTNET_VERSION)
-              performMultiLevelLookup: true
             displayName: Install the correct version of .NET Core
           # install the bits needed for .NET 6 builds
           - pwsh: .\scripts\install-dotnet.ps1 -Version $env:DOTNET_VERSION_PREVIEW -InstallDir "$env:AGENT_TOOLSDIRECTORY/dotnet"
             displayName: Install the preview version of .NET Core
-            condition: ne(variables.DOTNET_VERSION_PREVIEW, '')
+            condition: and(succeeded(), ne(variables.DOTNET_VERSION_PREVIEW, ''))
+          # display dotnet info
+          - pwsh: dotnet --info
+            displayName: Display all the .NET information
+          # install VS
           - ${{ if endsWith(parameters.name, '_windows') }}:
             - ${{ if eq(parameters.installPreviewVs, 'true') }}:
               - pwsh: .\scripts\install-vs.ps1
                 displayName: Install Visual Studio
+          # install workloads
           - ${{ if not(endsWith(parameters.name, '_linux')) }}:
             - pwsh: .\scripts\install-dotnet-workloads.ps1 -InstallDir "$env:AGENT_TOOLSDIRECTORY/dotnet" -SourceUrl "$env:DOTNET_WORKLOAD_SOURCE" -IsPreview $true
-              condition: ne(variables.DOTNET_VERSION_PREVIEW, '')
+              condition: and(succeeded(), ne(variables.DOTNET_VERSION_PREVIEW, ''))
               displayName: Install the preview .NET Core workloads
             - pwsh: .\scripts\install-dotnet-workloads.ps1 -InstallDir "$env:AGENT_TOOLSDIRECTORY/dotnet" -SourceUrl "$env:DOTNET_WORKLOAD_SOURCE" -IsPreview $false
-              condition: eq(variables.DOTNET_VERSION_PREVIEW, '')
+              condition: and(succeeded(), eq(variables.DOTNET_VERSION_PREVIEW, ''))
               displayName: Install the .NET Core workloads
-          # display dotnet info
-          - pwsh: dotnet --info
-            displayName: Display all the .NET information
 
       # select the correct/latest version of Visual Studio
       - ${{ if endsWith(parameters.name, '_windows') }}:
         - pwsh: .\scripts\select-vs.ps1
           displayName: Select Visual Studio
 
+      # install nuget
+      - ${{ if endsWith(parameters.name, '_windows') }}:
+        - pwsh: .\scripts\install-nuget.ps1
+          displayName: Install NuGet
+
       # install the mac tools
       - ${{ if endsWith(parameters.name, '_macos') }}:
-        - bash: echo '##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]'/Applications/Xcode_$(XCODE_VERSION).app;sudo xcode-select --switch /Applications/Xcode_$(XCODE_VERSION).app/Contents/Developer
-          displayName: Switch to the latest Xcode
+        - ${{ if startsWith(parameters.name, 'native_') }}:
+          - bash: sudo ./scripts/select-xcode.sh $(XCODE_VERSION_NATIVE)
+            displayName: Switch to the latest Xcode
+        - ${{ if not(startsWith(parameters.name, 'native_')) }}:
+          - bash: sudo ./scripts/select-xcode.sh $(XCODE_VERSION)
+            displayName: Switch to the latest Xcode
 
       # install the linux tools
       - ${{ if and(eq(parameters.installEmsdk, 'true'), endsWith(parameters.name, '_linux')) }}:
@@ -179,10 +191,6 @@ jobs:
         - pwsh: dotnet tool install -g ${{ tool }}
           displayName: Install ${{ tool }}
 
-      # install nuget
-      - pwsh: .\scripts\install-nuget.ps1
-        displayName: Install NuGet
-
       # download artifacts
       - template: azure-templates-download-artifacts.yml
         parameters:
diff --git a/scripts/azure-templates-github-status.yml b/scripts/azure-templates-github-status.yml
index b3905f223be..82ee6214658 100644
--- a/scripts/azure-templates-github-status.yml
+++ b/scripts/azure-templates-github-status.yml
@@ -26,7 +26,7 @@ steps:
       curl -v `
         -X POST `
         -H "Accept: application/vnd.github.v3+json" `
-        -H "Authorization: token $(Github.Token)" `
+        -H "Authorization: token $(Github.Token.Status)" `
         https://api.github.com/repos/$env:BUILD_REPOSITORY_ID/statuses/$env:SYSTEM_PULLREQUEST_SOURCECOMMITID `
         -d @temp-test.json
     displayName: ${{ parameters.displayName }}
diff --git a/scripts/azure-templates-stages.yml b/scripts/azure-templates-stages.yml
index aa9a41d8822..10430b8b466 100644
--- a/scripts/azure-templates-stages.yml
+++ b/scripts/azure-templates-stages.yml
@@ -2,8 +2,11 @@ parameters:
   isBuildPipeline: true
   buildExternals: 0
   VM_IMAGE_WINDOWS: ''
+  VM_IMAGE_WINDOWS_NATIVE: ''
   VM_IMAGE_MAC: ''
+  VM_IMAGE_MAC_NATIVE: ''
   VM_IMAGE_LINUX: ''
+  VM_IMAGE_LINUX_NATIVE: ''
 
 stages:
   - stage: prepare
@@ -36,7 +39,7 @@ stages:
             displayName: Android x86
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=x86
             installWindowsSdk: false
@@ -47,7 +50,7 @@ stages:
             displayName: Android x64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=x64
             installWindowsSdk: false
@@ -58,7 +61,7 @@ stages:
             displayName: Android arm
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=arm
             installWindowsSdk: false
@@ -69,7 +72,7 @@ stages:
             displayName: Android arm64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=arm64
             installWindowsSdk: false
@@ -80,7 +83,7 @@ stages:
             displayName: Tizen
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-tizen
             installWindowsSdk: false
             artifactName: native
@@ -90,7 +93,7 @@ stages:
             displayName: ANGLE x86
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: ANGLE
             additionalArgs: -Script .\native\uwp\build.cake --buildarch=x86
             artifactName: native
@@ -100,7 +103,7 @@ stages:
             displayName: ANGLE x64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: ANGLE
             additionalArgs: -Script .\native\uwp\build.cake --buildarch=x64
             artifactName: native
@@ -110,7 +113,7 @@ stages:
             displayName: ANGLE arm
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: ANGLE
             additionalArgs: -Script .\native\uwp\build.cake --buildarch=arm
             artifactName: native
@@ -120,7 +123,7 @@ stages:
             displayName: ANGLE arm64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: ANGLE
             additionalArgs: -Script .\native\uwp\build.cake --buildarch=arm64
             artifactName: native
@@ -130,7 +133,7 @@ stages:
             displayName: UWP x86
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-uwp
             additionalArgs: --buildarch=x86 --skipAngle=true
             artifactName: native
@@ -139,7 +142,7 @@ stages:
             name: native_uwp_x64_windows
             displayName: UWP x64
             buildExternals: ${{ parameters.buildExternals }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-uwp
             additionalArgs: --buildarch=x64 --skipAngle=true
             artifactName: native
@@ -149,7 +152,7 @@ stages:
             displayName: UWP arm
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-uwp
             additionalArgs: --buildarch=arm --skipAngle=true
             artifactName: native
@@ -159,7 +162,7 @@ stages:
             displayName: UWP arm64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-uwp
             additionalArgs: --buildarch=arm64 --skipAngle=true
             artifactName: native
@@ -169,7 +172,7 @@ stages:
             displayName: Win32 x86
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-windows
             additionalArgs: --buildarch=x86
             artifactName: native
@@ -179,7 +182,7 @@ stages:
             displayName: Win32 x64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-windows
             additionalArgs: --buildarch=x64
             artifactName: native
@@ -189,7 +192,7 @@ stages:
             displayName: Win32 arm64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-windows
             additionalArgs: --buildarch=arm64
             artifactName: native
@@ -199,7 +202,7 @@ stages:
             displayName: Nano Server x64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_WINDOWS}}
+            vmImage: ${{ parameters.VM_IMAGE_WINDOWS_NATIVE }}
             target: externals-nanoserver
             additionalArgs: --buildarch=x64
             artifactName: native
@@ -215,7 +218,7 @@ stages:
             displayName: Android x86
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=x86
         - template: azure-templates-bootstrapper.yml # Build Native Android|x64 (macOS)
@@ -224,7 +227,7 @@ stages:
             displayName: Android x64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=x64
         - template: azure-templates-bootstrapper.yml # Build Native Android|arm (macOS)
@@ -233,7 +236,7 @@ stages:
             displayName: Android arm
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=arm
         - template: azure-templates-bootstrapper.yml # Build Native Android|arm64 (macOS)
@@ -242,7 +245,7 @@ stages:
             displayName: Android arm64
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-android
             additionalArgs: --buildarch=arm64
         - template: azure-templates-bootstrapper.yml # Build Native iOS (macOS)
@@ -251,7 +254,7 @@ stages:
             displayName: iOS
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-ios
             artifactName: native
         - template: azure-templates-bootstrapper.yml # Build Native Mac Catalyst (macOS)
@@ -260,7 +263,7 @@ stages:
             displayName: Mac Catalyst
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-maccatalyst
             artifactName: native
         - template: azure-templates-bootstrapper.yml # Build Native macOS (macOS)
@@ -269,7 +272,7 @@ stages:
             displayName: macOS
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-macos
             artifactName: native
         - template: azure-templates-bootstrapper.yml # Build Native tvOS (macOS)
@@ -278,7 +281,7 @@ stages:
             displayName: tvOS
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-tvos
             artifactName: native
         - template: azure-templates-bootstrapper.yml # Build Native watchOS (macOS)
@@ -287,7 +290,7 @@ stages:
             displayName: watchOS
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-watchos
             artifactName: native
         - template: azure-templates-bootstrapper.yml # Build Native Tizen (macOS)
@@ -296,7 +299,7 @@ stages:
             displayName: Tizen
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_MAC }}
+            vmImage: ${{ parameters.VM_IMAGE_MAC_NATIVE }}
             target: externals-tizen
             condition: false # TODO: TIZEN INSTALL BUGS
 
@@ -310,7 +313,7 @@ stages:
             artifactName: native
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_LINUX }}
+            vmImage: ${{ parameters.VM_IMAGE_LINUX_NATIVE }}
             builds:
               - name: ''
               - name: nodeps
@@ -336,7 +339,7 @@ stages:
             displayName: Tizen
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_LINUX }}
+            vmImage: ${{ parameters.VM_IMAGE_LINUX_NATIVE }}
             packages: $(TIZEN_LINUX_PACKAGES)
             target: externals-tizen
 
@@ -349,7 +352,7 @@ stages:
           parameters:
             buildExternals: ${{ parameters.buildExternals }}
             isBuildPipeline: ${{ parameters.isBuildPipeline }}
-            vmImage: ${{ parameters.VM_IMAGE_LINUX }}
+            vmImage: ${{ parameters.VM_IMAGE_LINUX_NATIVE }}
             artifactName: native
             emscripten:
               - 2.0.5
diff --git a/scripts/azure-templates-variables.yml b/scripts/azure-templates-variables.yml
index 9a53bce84b6..d2409ef806a 100644
--- a/scripts/azure-templates-variables.yml
+++ b/scripts/azure-templates-variables.yml
@@ -32,7 +32,7 @@ steps:
       } else {
         Write-Host "Not a PR build."
       }
-    condition: eq(variables['Build.Reason'], 'ResourceTrigger')
+    condition: or(eq(variables['Build.Reason'], 'ResourceTrigger'), eq(variables['Build.Reason'], 'Manual'))
     displayName: Update the PR variables for downstream builds
 
   - pwsh: |
@@ -58,7 +58,7 @@ steps:
       $buildnumber = $match.Groups[2].Value
       Write-Host "Build number: $buildnumber"
       Write-Host "##vso[task.setvariable variable=BUILD_NUMBER]$buildnumber"
-    condition: eq(variables['Build.Reason'], 'ResourceTrigger')
+    condition: or(eq(variables['Build.Reason'], 'ResourceTrigger'), eq(variables['Build.Reason'], 'Manual'))
     displayName: Override the preview label and build number if this is a secondary build
 
   - pwsh: |
diff --git a/scripts/install-dotnet-workloads.ps1 b/scripts/install-dotnet-workloads.ps1
index df505433977..48ec1de6916 100644
--- a/scripts/install-dotnet-workloads.ps1
+++ b/scripts/install-dotnet-workloads.ps1
@@ -1,13 +1,11 @@
 Param(
-    [string] $InstallDir,
-    [string] $SourceUrl,
-    [boolean] $IsPreview = $true
+  [string] $SourceUrl,
+  [string] $InstallDir,
+  [boolean] $IsPreview = $true
 )
 
 $ErrorActionPreference = 'Stop'
 
-$env:DOTNET_ROOT="$InstallDir"
-
 $previewFeed = 'https://api.nuget.org/v3/index.json'
 $previewRuntime = 'https://api.nuget.org/v3/index.json'
 $previewEmscripten = 'https://api.nuget.org/v3/index.json'
diff --git a/scripts/install-dotnet.ps1 b/scripts/install-dotnet.ps1
index fd2697a0eb4..50ffbfe9040 100644
--- a/scripts/install-dotnet.ps1
+++ b/scripts/install-dotnet.ps1
@@ -1,32 +1,42 @@
 Param(
-    [string] $Version,
-    [string] $InstallDir,
-    [string] $FeedUrl = "https://dotnetbuilds.blob.core.windows.net/public"
+  [string] $Version,
+  [string] $InstallDir,
+  [string] $FeedUrl = "https://dotnetbuilds.blob.core.windows.net/public"
 )
 
 $ErrorActionPreference = 'Stop'
 
-if ($IsMacOS -or $IsLinux) {
-  $url = "https://dot.net/v1/dotnet-install.sh"
+$dotnetDll = Join-Path "$InstallDir" "sdk" "$Version" "dotnet.dll"
+if (Test-Path $dotnetDll) {
+  Write-Host ".NET already installed."
 } else {
-  $url = "https://dot.net/v1/dotnet-install.ps1"
-}
+  if ($IsMacOS -or $IsLinux) {
+    $url = "https://dot.net/v1/dotnet-install.sh"
+  } else {
+    $url = "https://dot.net/v1/dotnet-install.ps1"
+  }
 
-Write-Host "Downloading .NET Installer..."
-Invoke-WebRequest `
-  -Uri "$url" `
-  -OutFile (Split-Path $url -Leaf)
+  Write-Host "Downloading .NET Installer..."
+  Invoke-WebRequest `
+    -Uri "$url" `
+    -OutFile (Split-Path $url -Leaf)
 
-Write-Host "Installing .NET $Version..."
-if ($IsMacOS) {
-  & sh dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
-} elseif ($IsLinux) {
-  & bash dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
-} else {
-  .\dotnet-install.ps1 -Version "$Version" -InstallDir "$InstallDir" -AzureFeed "$FeedUrl" -Verbose
+  Write-Host "Installing .NET $Version..."
+  if ($IsMacOS) {
+    & sh dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
+  } elseif ($IsLinux) {
+    & bash dotnet-install.sh --version "$Version" --install-dir "$InstallDir" --azure-feed "$FeedUrl" --verbose
+  } else {
+    .\dotnet-install.ps1 -Version "$Version" -InstallDir "$InstallDir" -AzureFeed "$FeedUrl" -Verbose
+  }
+}
+
+if (-not $env:PATH.Contains($InstallDir)) {
+  $env:PATH = "$InstallDir" + [IO.Path]::PathSeparator + "$env:PATH"
+  Write-Host "##vso[task.setvariable variable=PATH;]$env:PATH"
 }
 
-Write-Host "Installed .NET Versions:"
-& dotnet --list-sdks
+Write-Host "Checking all dotnet info..."
+& dotnet --info
 
 exit $LASTEXITCODE
diff --git a/scripts/install-nuget.ps1 b/scripts/install-nuget.ps1
index 8252bd1dfc8..54c629b4169 100644
--- a/scripts/install-nuget.ps1
+++ b/scripts/install-nuget.ps1
@@ -22,7 +22,9 @@ New-Item -ItemType Directory -Force -Path $destDir | Out-Null
 Write-Host "Downloading NuGet: $uri..."
 .\scripts\download-file.ps1 -Uri $uri -OutFile $exe
 
-Write-Host "##vso[task.setvariable variable=PATH;]$destDir;$env:PATH";
-$env:PATH = "$destDir;$env:PATH"
+if (-not $env:PATH.Contains($destDir)) {
+    $env:PATH = "$destDir" + [IO.Path]::PathSeparator + "$env:PATH"
+    Write-Host "##vso[task.setvariable variable=PATH;]$env:PATH"
+}
 
 exit $LASTEXITCODE
diff --git a/scripts/install-openjdk.ps1 b/scripts/install-openjdk.ps1
index ca8e9028e68..227e9c7030d 100644
--- a/scripts/install-openjdk.ps1
+++ b/scripts/install-openjdk.ps1
@@ -56,8 +56,10 @@ $env:JAVA_HOME = "$java_home"
 
 # make sure that JAVA_HOME/bin is in the PATH
 $javaBin = Join-Path "$java_home" "bin"
-Write-Host "##vso[task.setvariable variable=PATH;]$javaBin;$env:PATH";
-$env:PATH = "$env:JAVA_HOME\bin;$env:PATH"
+if (-not $env:PATH.Contains($javaBin)) {
+    $env:PATH = "$javaBin" + [IO.Path]::PathSeparator + "$env:PATH"
+    Write-Host "##vso[task.setvariable variable=PATH;]$env:PATH"
+}
 
 java -version
 
diff --git a/scripts/install-python.ps1 b/scripts/install-python.ps1
index da23384fe9f..029a0869c7e 100644
--- a/scripts/install-python.ps1
+++ b/scripts/install-python.ps1
@@ -59,7 +59,11 @@ Write-Host "Extraction complete."
 Write-Host "Installing Python..."
 try {
     Push-Location "$tempDir"
-    .\setup.ps1
+    if ($IsMacOS -or $IsLinux) {
+        ./setup.sh
+    } else {
+        .\setup.ps1
+    }
 } finally {
     Pop-Location
 }
diff --git a/scripts/select-xamarin.sh b/scripts/select-xamarin.sh
new file mode 100755
index 00000000000..bf30945933c
--- /dev/null
+++ b/scripts/select-xamarin.sh
@@ -0,0 +1,21 @@
+#!/bin/bash -e -o pipefail
+
+MONO_VERSION=$1
+
+echo "Mono versions:"
+ls -ld /Library/Frameworks/Mono.framework/Versions/*
+
+echo "Xamarin.iOS versions:"
+ls -ld /Library/Frameworks/Xamarin.iOS.framework/Versions/*
+
+echo "Xamarin.Android versions:"
+ls -ld /Library/Frameworks/Xamarin.Android.framework/Versions/*
+
+echo "Xamarin.Mac versions:"
+ls -ld /Library/Frameworks/Xamarin.Mac.framework/Versions/*
+
+if [ -f "$AGENT_HOMEDIRECTORY/scripts/select-xamarin-sdk.sh" ]; then
+  $AGENT_HOMEDIRECTORY/scripts/select-xamarin-sdk.sh $MONO_VERSION
+else
+  echo "Skipping the switch because the script did not exist."
+fi
diff --git a/scripts/select-xcode.sh b/scripts/select-xcode.sh
new file mode 100755
index 00000000000..28dc4ccaf27
--- /dev/null
+++ b/scripts/select-xcode.sh
@@ -0,0 +1,10 @@
+#!/bin/bash -e -o pipefail
+
+XCODE_VERSION=$1
+
+echo "Xcode versions:"
+ls -ld /Applications/Xcode*.app
+
+echo "##vso[task.setvariable variable=MD_APPLE_SDK_ROOT;]/Applications/Xcode_$XCODE_VERSION.app"
+
+xcode-select --switch "/Applications/Xcode_$XCODE_VERSION.app/Contents/Developer"