diff --git a/src/coreclr/gc/gc.cpp b/src/coreclr/gc/gc.cpp
index 9ffb1de45c4488..cd859833330743 100644
--- a/src/coreclr/gc/gc.cpp
+++ b/src/coreclr/gc/gc.cpp
@@ -49318,8 +49318,18 @@ HRESULT GCHeap::Initialize()
         }
         else
         {
+#ifdef MULTIPLE_HEAPS
             // If no hard_limit is configured the reservation size is min of 1/2 GetVirtualMemoryLimit() or max of 256Gb or 2x physical limit.
             gc_heap::regions_range = max((size_t)256 * 1024 * 1024 * 1024, (size_t)(2 * gc_heap::total_physical_mem));
+#else // MUTLIPLE_HEAPS
+#if defined(TARGET_IOS) || defined(TARGET_TVOS)
+            // On iOS and tvOS only try to reserve 1/4 of physical memory
+            gc_heap::regions_range = (size_t)(gc_heap::total_physical_mem / 4);
+#else  // TARGET_IOS && TARGET_TVOS
+            // If no hard_limit is configured the reservation size is min of 1/2 GetVirtualMemoryLimit() or max of 256Gb or 2x physical limit.
+            gc_heap::regions_range = (size_t)(2 * gc_heap::total_physical_mem);
+#endif // TARGET_IOS && TARGET_TVOS
+#endif // MUTLIPLE_HEAPS
         }
         size_t virtual_mem_limit = GCToOSInterface::GetVirtualMemoryLimit();
         gc_heap::regions_range = min(gc_heap::regions_range, virtual_mem_limit/2);
diff --git a/src/coreclr/gc/gcpriv.h b/src/coreclr/gc/gcpriv.h
index e825b51d4d30c9..6806305ed1de6a 100644
--- a/src/coreclr/gc/gcpriv.h
+++ b/src/coreclr/gc/gcpriv.h
@@ -140,11 +140,11 @@ inline void FATAL_GC_ERROR()
 //
 // This means any empty regions can be freely used for any generation. For
 // Server GC we will balance regions between heaps.
-// For now disable regions for standalone GC and macOS builds
+// For now disable regions for standalone GC and iOS and tvOS builds
 // For SunOS or illumos this is temporary, until we can add MAP_PRIVATE
 // to the mmap() calls in unix/gcenv.unix.cpp  More details here:
 //    https://github.com/dotnet/runtime/issues/104211
-#if defined (HOST_64BIT) && !defined (BUILD_AS_STANDALONE) && !defined(__APPLE__) && !defined(__sun)
+#if defined (HOST_64BIT) && !defined (BUILD_AS_STANDALONE) && !defined(__sun)
 #define USE_REGIONS
 #endif //HOST_64BIT && BUILD_AS_STANDALONE && !__APPLE__
 
diff --git a/src/tests/nativeaot/SmokeTests/HardwareIntrinsics/Program.cs b/src/tests/nativeaot/SmokeTests/HardwareIntrinsics/Program.cs
index 92e8f656f681af..a80ac4abd49930 100644
--- a/src/tests/nativeaot/SmokeTests/HardwareIntrinsics/Program.cs
+++ b/src/tests/nativeaot/SmokeTests/HardwareIntrinsics/Program.cs
@@ -22,7 +22,7 @@ static int Main()
 
         long lowerBound, upperBound;
         lowerBound = 1200 * 1024; // ~1.2 MB
-        upperBound = 1600 * 1024; // ~1.6 MB
+        upperBound = 1700 * 1024; // ~1.7 MB
 
         if (fileSize < lowerBound || fileSize > upperBound)
         {