diff --git a/eng/Subsets.props b/eng/Subsets.props
index bfa808ab25cd9..12adcce07ce0f 100644
--- a/eng/Subsets.props
+++ b/eng/Subsets.props
@@ -254,12 +254,13 @@
   </ItemGroup>
 
   <!-- Build the CoreCLR cross tools when we're doing a cross build and either we're building any CoreCLR native tools for platforms CoreCLR fully supports or when someone explicitly requests them -->
-  <ItemGroup Condition="(('$(ClrRuntimeBuildSubsets)' != '' and '$(PrimaryRuntimeFlavor)' == 'CoreCLR' and '$(TargetsMobile)' != 'true') or $(_subset.Contains('+clr.crossarchtools+'))) and ('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)')">
+  <ItemGroup Condition="(('$(ClrRuntimeBuildSubsets)' != '' and '$(PrimaryRuntimeFlavor)' == 'CoreCLR') or $(_subset.Contains('+clr.crossarchtools+'))) and ('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)')">
     <ProjectToBuild
       Include="$(CoreClrProjectRoot)runtime.proj"
       AdditionalProperties="%(AdditionalProperties);
                             ClrCrossComponentsSubset=true;
                             HostArchitecture=$(BuildArchitecture);
+                            HostCrossOS=$(HostOS);
                             PgoInstrument=false;
                             NoPgoOptimize=true;
                             CrossBuild=false;
@@ -300,26 +301,6 @@
                             CMakeArgs=$(CMakeArgs) -DCLR_CROSS_COMPONENTS_BUILD=1" Category="clr" />
   </ItemGroup>
 
-  <!-- When targeting the iOS platforms with Native AOT, build the ClrAllJitsSubset and the Ilc for the host  -->
-  <PropertyGroup>
-    <IsNativeAOTHostBuildEnabled Condition="$(_subset.Contains('+clr.nativeaotruntime+')) and '$(NativeAotSupported)' == 'true' and '$(PrimaryRuntimeFlavor)' == 'CoreCLR' and '$(TargetsAppleMobile)' == 'true'">true</IsNativeAOTHostBuildEnabled>
-    <NativeAOTAdditionalProperties Condition="'$(IsNativeAOTHostBuildEnabled)' == 'true'">TargetOS=osx;TargetArchitecture=$(BuildArchitecture)</NativeAOTAdditionalProperties>
-  </PropertyGroup>
-  <ItemGroup Condition="'$(IsNativeAOTHostBuildEnabled)' == 'true'">
-    <ProjectToBuild
-      Include="$(CoreClrProjectRoot)runtime.proj"
-      AdditionalProperties="%(AdditionalProperties);
-                            $(NativeAOTAdditionalProperties);
-                            ClrAllJitsSubset=true;
-                            ClrCrossComponentsSubset=true;
-                            PgoInstrument=false;
-                            NoPgoOptimize=true;
-                            CMakeArgs=$(CMakeArgs) -DCLR_CROSS_COMPONENTS_BUILD=1"
-      Category="clr" />
-    <ProjectToBuild Include="$(CoreClrProjectRoot)tools\aot\ILCompiler\ILCompiler.csproj" Category="clr" AdditionalProperties="$(NativeAOTAdditionalProperties)" />
-    <ProjectToBuild Include="$(CoreClrProjectRoot)nativeaot\BuildIntegration\BuildIntegration.proj" Category="clr" AdditionalProperties="$(NativeAOTAdditionalProperties)" />
-  </ItemGroup>
-
   <ItemGroup Condition="$(_subset.Contains('+crossdacpack+'))">
     <ProjectToBuild Include="$(CoreClrProjectRoot).nuget\Microsoft.CrossOsDiag.Private.CoreCLR\Microsoft.CrossOsDiag.Private.CoreCLR.proj" Category="clr" />
   </ItemGroup>
@@ -336,8 +317,8 @@
     <ProjectToBuild Include="$(CoreClrProjectRoot)tools\aot\ILCompiler\ILCompiler.csproj" Category="clr" Condition="'$(NativeAotSupported)' == 'true'" />
     <ProjectToBuild Include="$(CoreClrProjectRoot)nativeaot\BuildIntegration\BuildIntegration.proj" Category="clr" Condition="'$(NativeAotSupported)' == 'true'" />
 
-    <ProjectToBuild Condition="'$(NativeAotSupported)' == 'true' and ('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)')" Include="$(CoreClrProjectRoot)tools\aot\ILCompiler\ILCompiler_crossarch.csproj" Category="clr" />
-    <ProjectToBuild Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)'" Include="$(CoreClrProjectRoot)tools\aot\crossgen2\crossgen2_crossarch.csproj" Category="clr" />
+    <ProjectToBuild Condition="'$(NativeAotSupported)' == 'true' and ('$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)' or '$(HostOS)' != '$(TargetOS)')" Include="$(CoreClrProjectRoot)tools\aot\ILCompiler\ILCompiler_crossarch.csproj" Category="clr" />
+    <ProjectToBuild Condition="'$(TargetArchitecture)' != '$(BuildArchitecture)' or '$(HostOS)' != '$(TargetOS)'" Include="$(CoreClrProjectRoot)tools\aot\crossgen2\crossgen2_crossarch.csproj" Category="clr" />
 
     <ProjectToBuild Condition="'$(TargetOS)' == 'windows' or ('$(TargetOS)' == 'linux' and ('$(TargetArchitecture)' == 'x64' or '$(TargetArchitecture)' == 'arm64')) or '$(TargetOS)' == 'osx'" Include="$(CoreClrProjectRoot)tools\SuperFileCheck\SuperFileCheck.csproj" Category="clr" />
   </ItemGroup>
diff --git a/eng/build.sh b/eng/build.sh
index bfe3d351e2a62..c4f18b3051df2 100755
--- a/eng/build.sh
+++ b/eng/build.sh
@@ -140,8 +140,8 @@ initDistroRid()
     local isCrossBuild="$3"
     local isPortableBuild="$4"
 
-    # Only pass ROOTFS_DIR if __DoCrossArchBuild is specified and the current platform is not OSX that doesn't use rootfs
-    if [[ $isCrossBuild == 1 && "$targetOs" != "osx" ]]; then
+    # Only pass ROOTFS_DIR if __DoCrossArchBuild is specified and the current platform is not an Apple platform (that doesn't use rootfs)
+    if [[ $isCrossBuild == 1 && "$targetOs" != "osx" && "$targetOs" != "ios" && "$targetOs" != "iossimulator" && "$targetOs" != "tvos" && "$targetOs" != "tvossimulator" && "$targetOs" != "maccatalyst" ]]; then
         passedRootfsDir=${ROOTFS_DIR}
     fi
     initDistroRidGlobal "${targetOs}" "${targetArch}" "${isPortableBuild}" "${passedRootfsDir}"
diff --git a/eng/liveBuilds.targets b/eng/liveBuilds.targets
index 855ad32118d3d..3830816fc037a 100644
--- a/eng/liveBuilds.targets
+++ b/eng/liveBuilds.targets
@@ -25,7 +25,7 @@
     <CoreCLRSharedFrameworkDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'sharedFramework'))</CoreCLRSharedFrameworkDir>
     <CoreCLRCrossgen2Dir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'crossgen2'))</CoreCLRCrossgen2Dir>
     <CoreCLRILCompilerDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'ilc-published'))</CoreCLRILCompilerDir>
-    <CoreCLRCrossILCompilerDir Condition="'$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)'">$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', '$(BuildArchitecture)', 'ilc'))</CoreCLRCrossILCompilerDir>
+    <CoreCLRCrossILCompilerDir Condition="'$(CrossBuild)' == 'true' or '$(BuildArchitecture)' != '$(TargetArchitecture)' or '$(HostOS)' != '$(TargetOS)'">$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', '$(BuildArchitecture)', 'ilc'))</CoreCLRCrossILCompilerDir>
     <CoreCLRAotSdkDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'aotsdk'))</CoreCLRAotSdkDir>
     <CoreCLRBuildIntegrationDir>$([MSBuild]::NormalizeDirectory('$(CoreCLRArtifactsPath)', 'build'))</CoreCLRBuildIntegrationDir>
 
diff --git a/eng/native/build-commons.sh b/eng/native/build-commons.sh
index e9d696fa87f14..8f4a19453bd7d 100755
--- a/eng/native/build-commons.sh
+++ b/eng/native/build-commons.sh
@@ -104,7 +104,7 @@ build_native()
             echo "Error: Unknown Android architecture $hostArch."
             exit 1
         fi
-    elif [[ "$__TargetOS" == iossimulator ]]; then
+    elif [[ "$targetOS" == iossimulator ]]; then
         cmakeArgs="-C $__RepoRootDir/eng/native/tryrun_ios_tvos.cmake $cmakeArgs"
 
         # set default iOS simulator deployment target
@@ -118,7 +118,7 @@ build_native()
             echo "Error: Unknown iOS Simulator architecture $__TargetArch."
             exit 1
         fi
-    elif [[ "$__TargetOS" == ios ]]; then
+    elif [[ "$targetOS" == ios ]]; then
         cmakeArgs="-C $__RepoRootDir/eng/native/tryrun_ios_tvos.cmake $cmakeArgs"
 
         # set default iOS device deployment target
@@ -130,7 +130,7 @@ build_native()
             echo "Error: Unknown iOS architecture $__TargetArch."
             exit 1
         fi
-    elif [[ "$__TargetOS" == tvossimulator ]]; then
+    elif [[ "$targetOS" == tvossimulator ]]; then
         cmakeArgs="-C $__RepoRootDir/eng/native/tryrun_ios_tvos.cmake $cmakeArgs"
 
         # set default tvOS simulator deployment target
@@ -144,7 +144,7 @@ build_native()
             echo "Error: Unknown tvOS Simulator architecture $__TargetArch."
             exit 1
         fi
-    elif [[ "$__TargetOS" == tvos ]]; then
+    elif [[ "$targetOS" == tvos ]]; then
         cmakeArgs="-C $__RepoRootDir/eng/native/tryrun_ios_tvos.cmake $cmakeArgs"
 
         # set default tvOS device deployment target
@@ -285,7 +285,6 @@ source "$__RepoRootDir/eng/native/init-os-and-arch.sh"
 
 __TargetArch=$arch
 __TargetOS=$os
-__HostOS=$os
 __OutputRid=''
 
 # Get the number of processors available to the scheduler
@@ -482,6 +481,16 @@ while :; do
             fi
             ;;
 
+        hostos|-hostos)
+            if [[ -n "$2" ]]; then
+                __HostOS="$2"
+                shift
+            else
+                echo "ERROR: 'hostos' requires a non-empty option argument"
+                exit 1
+            fi
+            ;;
+
         *)
             handle_arguments "$1" "$2"
             if [[ "$__ShiftArgs" == 1 ]]; then
@@ -498,6 +507,10 @@ if [[ -z "$__HostArch" ]]; then
     __HostArch=$__TargetArch
 fi
 
+if [[ -z "$__HostOS" ]]; then
+    __HostOS=$__TargetOS
+fi
+
 __CommonMSBuildArgs="/p:TargetArchitecture=$__TargetArch /p:Configuration=$__BuildType /p:TargetOS=$__TargetOS /nodeReuse:false $__OfficialBuildIdArg $__SignTypeArg $__SkipRestoreArg"
 
 # Configure environment if we are doing a verbose build
diff --git a/src/coreclr/build-runtime.sh b/src/coreclr/build-runtime.sh
index 90179bc475654..31c5cc286d530 100755
--- a/src/coreclr/build-runtime.sh
+++ b/src/coreclr/build-runtime.sh
@@ -173,7 +173,7 @@ fi
 
 eval "$__RepoRootDir/eng/native/version/copy_version_files.sh"
 
-build_native "$__TargetOS" "$__HostArch" "$__ProjectRoot" "$__IntermediatesDir" "$__CMakeTarget" "$__CMakeArgs" "CoreCLR component"
+build_native "$__HostOS" "$__HostArch" "$__ProjectRoot" "$__IntermediatesDir" "$__CMakeTarget" "$__CMakeArgs" "CoreCLR component"
 
 # Build complete
 
diff --git a/src/coreclr/crosscomponents.cmake b/src/coreclr/crosscomponents.cmake
index 2bd288221192f..a95a1722a6f8f 100644
--- a/src/coreclr/crosscomponents.cmake
+++ b/src/coreclr/crosscomponents.cmake
@@ -1,35 +1,37 @@
 # Add targets to the crosscomponents subcomponent build
-if (CLR_CMAKE_HOST_OS STREQUAL CLR_CMAKE_TARGET_OS)
+if (CLR_CMAKE_HOST_OS STREQUAL CLR_CMAKE_TARGET_OS OR CLR_CMAKE_TARGET_IOS OR CLR_CMAKE_TARGET_TVOS OR CLR_CMAKE_TARGET_MACCATALYST)
     install_clr (TARGETS
         jitinterface_${ARCH_HOST_NAME}
         DESTINATIONS .
         COMPONENT crosscomponents
     )
 
-    if (CLR_CMAKE_TARGET_OSX AND ARCH_TARGET_NAME STREQUAL arm64)
-        install_clr (TARGETS
-            clrjit_universal_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
-            DESTINATIONS .
-            COMPONENT crosscomponents
-        )
-    elseif (CLR_CMAKE_TARGET_ARCH_ARM OR CLR_CMAKE_TARGET_ARCH_ARM64)
-        install_clr (TARGETS
-            clrjit_universal_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
-            DESTINATIONS .
-            COMPONENT crosscomponents
-        )
-    elseif (CLR_CMAKE_TARGET_UNIX)
-        install_clr (TARGETS
-            clrjit_unix_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
-            DESTINATIONS .
-            COMPONENT crosscomponents
-        )
-    else()
-        install_clr (TARGETS
-            clrjit_win_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
-            DESTINATIONS .
-            COMPONENT crosscomponents
-        )
+    if (NOT (CLR_CMAKE_TARGET_IOS OR CLR_CMAKE_TARGET_TVOS OR CLR_CMAKE_TARGET_MACCATALYST))
+        if (CLR_CMAKE_TARGET_OSX AND ARCH_TARGET_NAME STREQUAL arm64)
+            install_clr (TARGETS
+                clrjit_universal_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
+                DESTINATIONS .
+                COMPONENT crosscomponents
+            )
+        elseif (CLR_CMAKE_TARGET_ARCH_ARM OR CLR_CMAKE_TARGET_ARCH_ARM64)
+            install_clr (TARGETS
+                clrjit_universal_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
+                DESTINATIONS .
+                COMPONENT crosscomponents
+            )
+        elseif (CLR_CMAKE_TARGET_UNIX)
+            install_clr (TARGETS
+                clrjit_unix_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
+                DESTINATIONS .
+                COMPONENT crosscomponents
+            )
+        else()
+            install_clr (TARGETS
+                clrjit_win_${ARCH_TARGET_NAME}_${ARCH_HOST_NAME}
+                DESTINATIONS .
+                COMPONENT crosscomponents
+            )
+        endif()
     endif()
 endif()
 
diff --git a/src/coreclr/runtime.proj b/src/coreclr/runtime.proj
index 496e28198429f..0b936f4579c56 100644
--- a/src/coreclr/runtime.proj
+++ b/src/coreclr/runtime.proj
@@ -45,6 +45,7 @@
       <_CoreClrBuildArg Condition="'$(PgoInstrument)' == 'true'" Include="-pgoinstrument" />
       <_CoreClrBuildArg Condition="'$(NativeOptimizationDataSupported)' == 'true' and '$(NoPgoOptimize)' != 'true' and '$(PgoInstrument)' != 'true'" Include="-pgodatapath &quot;$(PgoPackagePath)&quot;" />
       <_CoreClrBuildArg Condition="'$(HostArchitecture)' != ''" Include="-hostarch $(HostArchitecture)" />
+      <_CoreClrBuildArg Condition="'$(HostCrossOS)' != ''" Include="-hostos $(HostCrossOS)" />
       <_CoreClrBuildArg Include="-outputrid $(OutputRID)" />
     </ItemGroup>
 
diff --git a/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj b/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj
index 7e5f930584abf..564a02b632bfb 100644
--- a/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj
+++ b/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj
@@ -42,7 +42,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(TargetOS)' != 'osx' and '$(TargetTriple)' != ''" />
+      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(_IsApplePlatform)' != 'true' and '$(TargetTriple)' != ''" />
     </ItemGroup>
   </Target>
 
@@ -68,7 +68,7 @@
   </Target>
 
   <ItemGroup Condition="'$(NativeAotSupported)' == 'true'">
-    <CustomLinkerArg Condition="'$(CrossBuild)' == 'true' and '$(_hostArchitecture)' == '$(_targetArchitecture)' and '$(_hostOS)' != 'windows'" Include="--gcc-toolchain=$(ROOTFS_DIR)/usr" />
+    <CustomLinkerArg Condition="'$(CrossBuild)' == 'true' and '$(_hostArchitecture)' == '$(_targetArchitecture)' and '$(_hostOS)' != 'windows' and '$(_IsApplePlatform)' != 'true'" Include="--gcc-toolchain=$(ROOTFS_DIR)/usr" />
   </ItemGroup>
 
   <Target Name="PublishCompiler"
diff --git a/src/coreclr/tools/aot/crossgen2/crossgen2.csproj b/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
index ceeb4d63ad0c1..3702d32900776 100644
--- a/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
+++ b/src/coreclr/tools/aot/crossgen2/crossgen2.csproj
@@ -40,7 +40,7 @@
   </PropertyGroup>
 
   <ItemGroup Condition="'$(NativeAotSupported)' == 'true'">
-    <CustomLinkerArg Condition="'$(CrossBuild)' == 'true' and '$(_hostArchitecture)' == '$(_targetArchitecture)' and '$(_hostOS)' != 'windows'" Include="--gcc-toolchain=$(ROOTFS_DIR)/usr" />
+    <CustomLinkerArg Condition="'$(CrossBuild)' == 'true' and '$(_hostArchitecture)' == '$(_targetArchitecture)' and '$(_IsApplePlatform)' != 'true' and '$(_hostOS)' != 'windows'" Include="--gcc-toolchain=$(ROOTFS_DIR)/usr" />
   </ItemGroup>
 
   <Import Project="$(R2ROverridePath)" Condition="'$(R2ROverridePath)' != ''" />
@@ -81,7 +81,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(TargetOS)' != 'osx' and '$(TargetTriple)' != ''" />
+      <LinkerArg Include="--target=$(TargetTriple)" Condition="'$(_IsApplePlatform)' != 'true' and '$(TargetTriple)' != ''" />
     </ItemGroup>
   </Target>
 
diff --git a/src/mono/sample/iOS-NativeAOT/Program.csproj b/src/mono/sample/iOS-NativeAOT/Program.csproj
index cb9d6c6c8b27c..89862c9d8e1a4 100644
--- a/src/mono/sample/iOS-NativeAOT/Program.csproj
+++ b/src/mono/sample/iOS-NativeAOT/Program.csproj
@@ -47,7 +47,7 @@
   <Target Name="ConfigureIlcPathsForiOSCrossCompilation" Condition="'$(PublishAotUsingRuntimePack)' != 'true'"
     BeforeTargets="SetupProperties">
       <PropertyGroup>
-        <IlcPath>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'artifacts', 'bin', 'coreclr', '$(HostOS).$(BuildArchitecture).$(CoreCLRConfiguration)', 'ilc'))</IlcPath>
+        <IlcPath>$([MSBuild]::NormalizeDirectory('$(RepoRoot)', 'artifacts', 'bin', 'coreclr', '$(TargetOS).$(TargetArchitecture).$(CoreCLRConfiguration)', '$(BuildArchitecture)' ,'ilc'))</IlcPath>
         <IlcToolsPath>$(IlcPath)</IlcToolsPath>
         <IlcSdkPath>$(CoreCLRAotSdkDir)</IlcSdkPath>
         <IlcFrameworkPath>$(LibrariesAllBinArtifactsPath)</IlcFrameworkPath>