dotnet · mkhamoyan · Dec 19, 2023 · Oct 4, 2023 · Oct 9, 2023 · Oct 9, 2023
diff --git a/eng/testing/tests.ioslike.targets b/eng/testing/tests.ioslike.targets
@@ -77,7 +77,7 @@
                    Include="@(AppleAssembliesToBundle)"          TargetDir="extraFiles\%(AppleAssembliesToBundle.RecursiveDir)" />
     </ItemGroup>
 
-    <ItemGroup Condition="'$(UseNativeAOTRuntime)' == 'true'">
+    <ItemGroup Condition="'$(UseNativeAOTRuntime)' == 'true' and '$(HybridGlobalization)' == 'false'" >
       <BundleFiles Include="$(MicrosoftNetCoreAppRuntimePackDir)/runtimes/$(TargetOS)-$(TargetArchitecture)/native/icudt.dat"
                                                                 TargetDir="publish" />
       <BundleFiles Include="$(MicrosoftNetCoreAppRuntimePackDir)/runtimes/$(TargetOS)-$(TargetArchitecture)/native/libicudata.a"
@@ -157,6 +157,9 @@
     <WriteLinesToFile File="$(PublishDir)xunit-excludes.txt" Lines="$(XunitExcludesTxtFileContent)" Overwrite="true" />
 
     <PropertyGroup>
+      <!-- Default for now. If we can remove our ICU and rely on the system one, then HybridGlobalization becomes the default and we can remove checks for it -->
+      <HybridGlobalization>true</HybridGlobalization>
+
       <IncludesTestRunner Condition="'$(IncludesTestRunner)' == ''">true</IncludesTestRunner>
       <Optimized Condition="'$(Configuration)' == 'Release'">true</Optimized>
       <MainLibraryFileName Condition="'$(MainLibraryFileName)' == '' and '$(IsRuntimeTests)' != 'true' and '$(IncludesTestRunner)' == 'true'">AppleTestRunner.dll</MainLibraryFileName>

@@ -75,9 +75,9 @@ The .NET Foundation licenses this file to you under the MIT license.
       <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.Apple" Condition="'$(_IsApplePlatform)' == 'true'" />
       <!-- Not compliant for iOS-like platforms -->
       <NetCoreAppNativeLibrary Include="System.Security.Cryptography.Native.OpenSsl" Condition="'$(StaticOpenSslLinking)' != 'true' and '$(_IsiOSLikePlatform)' != 'true'" />
-      <NetCoreAppNativeLibrary Include="icudata" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true'" />
-      <NetCoreAppNativeLibrary Include="icui18n" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true'" />
-      <NetCoreAppNativeLibrary Include="icuuc" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true'" />
+      <NetCoreAppNativeLibrary Include="icudata" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true' and '$(HybridGlobalization)' != 'true'" />
+      <NetCoreAppNativeLibrary Include="icui18n" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true' and '$(HybridGlobalization)' != 'true'" />
+      <NetCoreAppNativeLibrary Include="icuuc" Condition="'$(_IsiOSLikePlatform)' == 'true' and '$(InvariantGlobalization)' != 'true' and '$(HybridGlobalization)' != 'true'" />
     </ItemGroup>
 
     <ItemGroup>

diff --git a/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs b/src/libraries/Common/tests/TestUtilities/System/PlatformDetection.cs
@@ -376,7 +376,7 @@ public static string GetDistroVersionString()
         public static bool IsIcuGlobalization => ICUVersion > new Version(0, 0, 0, 0);
         public static bool IsIcuGlobalizationAndNotHybridOnBrowser => IsIcuGlobalization && IsNotHybridGlobalizationOnBrowser;
         public static bool IsIcuGlobalizationAndNotHybrid => IsIcuGlobalization && IsNotHybridGlobalization;
-        public static bool IsNlsGlobalization => IsNotInvariantGlobalization && !IsIcuGlobalization;
+        public static bool IsNlsGlobalization => IsNotInvariantGlobalization && !IsIcuGlobalization && !IsHybridGlobalization;
 
         public static bool IsSubstAvailable
         {

diff --git a/src/libraries/System.Collections.NonGeneric/tests/CaseInsensitiveComparerTests.cs b/src/libraries/System.Collections.NonGeneric/tests/CaseInsensitiveComparerTests.cs
@@ -64,7 +64,7 @@ public void Ctor_CultureInfo_Compare(object a, object b, int expected)
             }
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalizationOnOSX))]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/37069", TestPlatforms.Android | TestPlatforms.LinuxBionic)]
         public void Ctor_CultureInfo_Compare_TurkishI()
         {

diff --git a/src/libraries/System.Collections.NonGeneric/tests/CaseInsensitiveHashCodeProviderTests.cs b/src/libraries/System.Collections.NonGeneric/tests/CaseInsensitiveHashCodeProviderTests.cs
@@ -94,7 +94,7 @@ public void Ctor_CultureInfo_ChangeCurrentCulture_GetHashCodeCompare(object a, o
             }
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalizationOnOSX))]
         [ActiveIssue("https://github.com/dotnet/runtime/issues/37069", TestPlatforms.Android | TestPlatforms.LinuxBionic)]
         public void Ctor_CultureInfo_GetHashCodeCompare_TurkishI()
         {
@@ -154,12 +154,15 @@ public void Default_GetHashCodeCompare(object a, object b, bool expected)
         [ActiveIssue("https://github.com/dotnet/runtime/issues/37069", TestPlatforms.Android | TestPlatforms.LinuxBionic)]
         public void Default_Compare_TurkishI()
         {
-            // Turkish has lower-case and upper-case version of the dotted "i", so the upper case of "i" (U+0069) isn't "I" (U+0049)
-            // but rather U+0130.
-            using (new ThreadCultureChange("tr-TR"))
+            if (PlatformDetection.IsNotHybridGlobalizationOnOSX)
             {
-                Assert.False(CaseInsensitiveHashCodeProvider.Default.GetHashCode("file") == CaseInsensitiveHashCodeProvider.Default.GetHashCode("FILE"));
-                Assert.True(CaseInsensitiveHashCodeProvider.DefaultInvariant.GetHashCode("file") == CaseInsensitiveHashCodeProvider.DefaultInvariant.GetHashCode("FILE"));
+                // Turkish has lower-case and upper-case version of the dotted "i", so the upper case of "i" (U+0069) isn't "I" (U+0049)
+                // but rather U+0130.
+                using (new ThreadCultureChange("tr-TR"))
+                {
+                    Assert.False(CaseInsensitiveHashCodeProvider.Default.GetHashCode("file") == CaseInsensitiveHashCodeProvider.Default.GetHashCode("FILE"));
+                    Assert.True(CaseInsensitiveHashCodeProvider.DefaultInvariant.GetHashCode("file") == CaseInsensitiveHashCodeProvider.DefaultInvariant.GetHashCode("FILE"));
+                }
             }
 
             using (new ThreadCultureChange("en-US"))

diff --git a/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlDecimalTest.cs b/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlDecimalTest.cs
@@ -196,6 +196,7 @@ public void AdjustScale()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void ConvertToPrecScale()
         {
             Assert.Equal(new SqlDecimal(6464.6m).Value, SqlDecimal.ConvertToPrecScale(_test1, 5, 1).Value);

diff --git a/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlStringSortingTest.cs b/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlStringSortingTest.cs
@@ -38,6 +38,7 @@ public static class SqlStringSortingTest
         private static readonly UnicodeEncoding s_unicodeEncoding = new UnicodeEncoding(bigEndian: false, byteOrderMark: false, throwOnInvalidBytes: true);
 
         [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNotInvariantGlobalization))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         [InlineData("ja-JP", 0x0411)] // Japanese - Japan
         [InlineData("ar-SA", 0x0401)] // Arabic - Saudi Arabia
         [InlineData("de-DE", 0x0407)] // German - Germany

diff --git a/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlStringTest.cs b/src/libraries/System.Data.Common/tests/System/Data/SqlTypes/SqlStringTest.cs
@@ -56,6 +56,7 @@ public SqlStringTest()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void Constructor_Value_Success()
         {
             const string value = "foo";
@@ -219,6 +220,7 @@ public void CompareToSqlTypeException()
         }
 
         [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotInvariantGlobalization))]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void CompareTo()
         {
             Assert.True(_test1.CompareTo(_test3) < 0);
@@ -259,6 +261,7 @@ public void CompareTo()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void EqualsMethods()
         {
             Assert.False(_test1.Equals(_test2));
@@ -275,6 +278,7 @@ public void EqualsMethods()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void Greaters()
         {
             // GreateThan ()
@@ -289,6 +293,7 @@ public void Greaters()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void Lessers()
         {
             // LessThan()
@@ -304,6 +309,7 @@ public void Lessers()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void NotEquals()
         {
             Assert.True(SqlString.NotEquals(_test1, _test2).Value);
@@ -314,6 +320,7 @@ public void NotEquals()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void Concat()
         {
             _test1 = new SqlString("First TestString");
@@ -325,6 +332,7 @@ public void Concat()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void Clone()
         {
             SqlString testSqlString = _test1.Clone();
@@ -344,6 +352,7 @@ public void CompareOptionsFromSqlCompareOptions()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void UnicodeBytes()
         {
             Assert.Equal((byte)105, _test1.GetNonUnicodeBytes()[1]);
@@ -540,6 +549,7 @@ public void Conversions()
         // OPERATORS
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void ArithmeticOperators()
         {
             SqlString testString = new SqlString("...Testing...");
@@ -548,6 +558,7 @@ public void ArithmeticOperators()
         }
 
         [Fact]
+        [ActiveIssue("https://github.com/dotnet/runtime/issues/95195", typeof(PlatformDetection), nameof(PlatformDetection.IsHybridGlobalizationOnOSX))]
         public void ThanOrEqualOperators()
         {
             // == -operator

diff --git a/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.iOS.xml b/src/libraries/System.Private.CoreLib/src/ILLink/ILLink.Substitutions.iOS.xml
@@ -0,0 +1,10 @@
+<linker>
+  <assembly fullname="System.Private.CoreLib">
+    <type fullname="System.Globalization.GlobalizationMode">
+      <method signature="System.Boolean get_Hybrid()" body="stub" value="true" feature="System.Globalization.Hybrid" featurevalue="true" />
+    </type>
+    <type fullname="System.Globalization.GlobalizationMode/Settings">
+      <method signature="System.Boolean get_Hybrid()" body="stub" value="true" feature="System.Globalization.Hybrid" featurevalue="true" />
+    </type>
+  </assembly>
+</linker>
diff --git a/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems b/src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems
@@ -63,6 +63,7 @@
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoX86Intrinsics.xml" Condition="'$(SupportsX86Intrinsics)' != 'true'" />
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.NoWasmIntrinsics.xml" Condition="'$(SupportsWasmIntrinsics)' != 'true'" />
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.OSX.xml" Condition="'$(IsOSXLike)' == 'true'" />
+    <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.iOS.xml" Condition="'$(IsiOSLike)' == 'true'" />
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.Windows.xml" Condition="'$(TargetsWindows)' == 'true'" />
     <ILLinkSubstitutionsXmls Include="$(ILLinkSharedDirectory)ILLink.Substitutions.Browser.xml" Condition="'$(TargetsBrowser)' == 'true'" />
     <ILLinkLinkAttributesXmls Include="$(ILLinkSharedDirectory)ILLink.LinkAttributes.Shared.xml" />

diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/CompareInfo.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/CompareInfo.cs
@@ -1532,7 +1532,7 @@ private int GetSortKeyLengthCore(ReadOnlySpan<char> source, CompareOptions optio
               NlsGetSortKeyLength(source, options) :
 #if TARGET_BROWSER
             GlobalizationMode.Hybrid ?
-                throw new PlatformNotSupportedException(GetPNSEText("SortKey")) :
+              throw new PlatformNotSupportedException(GetPNSEText("SortKey")) :
 #endif
               IcuGetSortKeyLength(source, options);
 

diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/CompareInfo.iOS.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/CompareInfo.iOS.cs
@@ -79,7 +79,7 @@ private static void AssertComparisonSupported(CompareOptions options)
                 throw new PlatformNotSupportedException(GetPNSE(options));
         }
 
-        private const CompareOptions SupportedCompareOptions = CompareOptions.None | CompareOptions.IgnoreCase | CompareOptions.IgnoreNonSpace |
+        private const CompareOptions SupportedCompareOptions = CompareOptions.None | CompareOptions.IgnoreCase | CompareOptions.IgnoreKanaType | CompareOptions.IgnoreNonSpace |
                                                                CompareOptions.IgnoreWidth | CompareOptions.StringSort;
 
         private static string GetPNSE(CompareOptions options) =>

diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/GlobalizationMode.Unix.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/GlobalizationMode.Unix.cs
@@ -12,6 +12,7 @@ private static partial class Settings
             /// the GlobalizationMode.Invariant check. Globalization P/Invokes, e.g. in CompareInfo.GetSortKey,
             /// rely on ICU already being loaded before they are called.
             /// </summary>
+#if !TARGET_MACCATALYST && !TARGET_IOS && !TARGET_TVOS
             static Settings()
             {
                 // Use GlobalizationMode.Invariant to allow ICU initialization to be trimmed when Invariant=true
@@ -32,6 +33,7 @@ static Settings()
                     }
                 }
             }
+#endif
 
             private static string GetIcuLoadFailureMessage()
             {

diff --git a/src/libraries/System.Private.CoreLib/src/System/Globalization/GlobalizationMode.cs b/src/libraries/System.Private.CoreLib/src/System/Globalization/GlobalizationMode.cs
@@ -13,7 +13,9 @@ internal static partial class GlobalizationMode
         private static partial class Settings
         {
             internal static bool Invariant { get; } = AppContextConfigHelper.GetBooleanConfig("System.Globalization.Invariant", "DOTNET_SYSTEM_GLOBALIZATION_INVARIANT");
-#if TARGET_MACCATALYST || TARGET_IOS || TARGET_TVOS || TARGET_BROWSER
+#if TARGET_MACCATALYST || TARGET_IOS || TARGET_TVOS
+            internal static bool Hybrid { get; } = true;
+#elif TARGET_BROWSER
             internal static bool Hybrid { get; } = AppContextConfigHelper.GetBooleanConfig("System.Globalization.Hybrid", "DOTNET_SYSTEM_GLOBALIZATION_HYBRID");
 #endif
             internal static bool PredefinedCulturesOnly { get; } = AppContextConfigHelper.GetBooleanConfig("System.Globalization.PredefinedCulturesOnly", "DOTNET_SYSTEM_GLOBALIZATION_PREDEFINED_CULTURES_ONLY", GlobalizationMode.Invariant);

diff --git a/...ries/System.Runtime/tests/System.Globalization.Extensions.Tests/GetStringComparerTests.cs b/...ries/System.Runtime/tests/System.Globalization.Extensions.Tests/GetStringComparerTests.cs
@@ -19,7 +19,7 @@ public void GetStringComparer_Invalid()
             AssertExtensions.Throws<ArgumentException>("options", () => new CultureInfo("tr-TR").CompareInfo.GetStringComparer(CompareOptions.OrdinalIgnoreCase | CompareOptions.IgnoreCase));
         }
 
-        [Theory]
+        [ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalization))]
         [InlineData("hello", "hello", "fr-FR", CompareOptions.IgnoreCase, 0, 0)]
         [InlineData("hello", "HELLo", "fr-FR", CompareOptions.IgnoreCase, 0, 0)]
         [InlineData("hello", null, "fr-FR", CompareOptions.IgnoreCase, 1, 1)]

diff --git a/...ies/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs b/...ies/System.Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/Data/Factory.cs
@@ -26,7 +26,7 @@ private static string RemoveComment(string line)
         private static Stream GetIdnaTestTxt()
         {
             string fileName = null;
-            if (PlatformDetection.ICUVersion >= new Version(66, 0))
+            if (PlatformDetection.ICUVersion >= new Version(66, 0) || PlatformDetection.IsHybridGlobalizationOnOSX)
                 fileName = "IdnaTest_13.txt";
             else if (PlatformDetection.IsWindows7)
                 fileName = "IdnaTest_Win7.txt";
@@ -61,7 +61,7 @@ private static IEnumerable<IConformanceIdnaTest> ParseFile(Stream stream, Func<s
 
         private static IConformanceIdnaTest GetConformanceIdnaTest(string line, int lineCount)
         {
-            if (PlatformDetection.ICUVersion >= new Version(66, 0))
+            if (PlatformDetection.ICUVersion >= new Version(66, 0) || PlatformDetection.IsHybridGlobalizationOnOSX)
                 return new Unicode_13_0_IdnaTest(line, lineCount);
             else if (PlatformDetection.IsWindows7)
                 return new Unicode_Win7_IdnaTest(line, lineCount);
@@ -88,7 +88,7 @@ public static IEnumerable<IConformanceIdnaTest> GetDataset()
         {
             // Nls is transitional so we filter out non transitional test cases.
             // Icu is the opposite.
-            IdnType idnFilter = PlatformDetection.IsNlsGlobalization ? IdnType.Nontransitional : IdnType.Transitional;
+            IdnType idnFilter = PlatformDetection.IsNlsGlobalization || PlatformDetection.IsHybridGlobalizationOnOSX ? IdnType.Nontransitional : IdnType.Transitional;
             foreach (var entry in ParseFile(GetIdnaTestTxt(), GetConformanceIdnaTest))
             {
                 if (entry.Type != idnFilter && entry.Source != string.Empty)

diff --git a/...Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/IdnMappingGetAsciiTests.cs b/...Runtime/tests/System.Globalization.Extensions.Tests/IdnMapping/IdnMappingGetAsciiTests.cs
@@ -21,7 +21,7 @@ public static IEnumerable<object[]> GetAscii_TestData()
                 }
 
                 string ascii = c.ToString();
-                if (!PlatformDetection.IsIcuGlobalization || c != '-') // expected platform differences, see https://github.com/dotnet/runtime/issues/17190
+                if ((!PlatformDetection.IsIcuGlobalization && !PlatformDetection.IsHybridGlobalizationOnOSX) || c != '-') // expected platform differences, see https://github.com/dotnet/runtime/issues/17190
                 {
                     yield return new object[] { ascii, 0, 1, ascii };
                 }

diff --git a/...ests/System.Globalization.Extensions.Tests/IdnMapping/IdnMappingUseStd3AsciiRulesTests.cs b/...ests/System.Globalization.Extensions.Tests/IdnMapping/IdnMappingUseStd3AsciiRulesTests.cs
@@ -49,7 +49,7 @@ public void UseStd3AsciiRules_ChangesGetAsciiBehavior(string unicode, bool conta
             var idnStd3False = new IdnMapping { UseStd3AsciiRules = false };
             var idnStd3True = new IdnMapping { UseStd3AsciiRules = true };
 
-            if (containsInvalidHyphen && PlatformDetection.IsIcuGlobalization)
+            if (containsInvalidHyphen && (PlatformDetection.IsIcuGlobalization || PlatformDetection.IsHybridGlobalizationOnOSX))
             {
                 // ICU always fails on leading/trailing hyphens regardless of the Std3 rules option.
                 AssertExtensions.Throws<ArgumentException>("unicode", () => idnStd3False.GetAscii(unicode));

diff --git a/...em.Runtime/tests/System.Globalization.Tests/DateTimeFormatInfo/DateTimeFormatInfoTests.cs b/...em.Runtime/tests/System.Globalization.Tests/DateTimeFormatInfo/DateTimeFormatInfoTests.cs
@@ -67,7 +67,7 @@ public void NativeCalendarName_Get_ReturnsExpected(DateTimeFormatInfo dtfi, Cale
             {
                 dtfi.Calendar = calendar;
 
-                if (PlatformDetection.IsNotUsingLimitedCultures)
+                if (PlatformDetection.IsNotUsingLimitedCultures || PlatformDetection.IsHybridGlobalizationOnOSX)
                 {
                     // Mobile / Browser ICU doesn't contain NativeCalendarName,
                     Assert.Equal(nativeCalendarName, dtfi.NativeCalendarName);

diff --git a/src/libraries/System.Runtime/tests/System.Reflection.Tests/AssemblyNameTests.cs b/src/libraries/System.Runtime/tests/System.Reflection.Tests/AssemblyNameTests.cs
@@ -221,7 +221,7 @@ public void CultureName_Set(AssemblyName assemblyName, string originalCultureNam
             Assert.Equal(new AssemblyName(expectedEqualString).FullName, assemblyName.FullName);
         }
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalizationOnOSX))]
         public void CultureName_Set_Invalid_ThrowsCultureNotFoundException()
         {
             var assemblyName = new AssemblyName("Test");

diff --git a/...braries/System.Runtime/tests/System.Runtime.Extensions.Tests/System/Convert.ToDateTime.cs b/...braries/System.Runtime/tests/System.Runtime.Extensions.Tests/System/Convert.ToDateTime.cs
@@ -10,7 +10,7 @@ public class ConvertToDateTimeTests : ConvertTestBase<DateTime>
     {
         private static readonly DateTimeFormatInfo s_dateTimeFormatInfo = new DateTimeFormatInfo();
 
-        [Fact]
+        [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalizationOnOSX))]
         public void FromString()
         {
             DateTime[] expectedValues = { new DateTime(1999, 12, 31, 23, 59, 59), new DateTime(100, 1, 1, 0, 0, 0), new DateTime(2216, 2, 29, 0, 0, 0), new DateTime(1, 1, 1, 0, 0, 0) };
-Original file line number
+Diff line change
@@ Expand Up @@
                 }
             }
-            [Fact]
+            [ConditionalFact(typeof(PlatformDetection), nameof(PlatformDetection.IsNotHybridGlobalizationOnOSX))]
             [ActiveIssue("https://github.com/dotnet/runtime/issues/37069", TestPlatforms.Android | TestPlatforms.LinuxBionic)]
             public void Ctor_CultureInfo_Compare_TurkishI()
             {
@@ Expand Down @@