Index: compiler-rt/lib/tsan/rtl/tsan_platform.h
===================================================================
--- compiler-rt/lib/tsan/rtl/tsan_platform.h
+++ compiler-rt/lib/tsan/rtl/tsan_platform.h
@@ -26,6 +26,18 @@
 #if !SANITIZER_GO
 
 #if defined(__x86_64__)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#elif SANITIZER_IOSSIM // arm64 iOS simulators (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#elif SANITIZER_IOS // arm64 iOS devices (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 0
+#elif SANITIZER_MAC // arm64 macOS (order of #if matters)
+#define HAS_48_BIT_ADDRESS_SPACE 1
+#else
+#define HAS_48_BIT_ADDRESS_SPACE 0
+#endif
+
+#if HAS_48_BIT_ADDRESS_SPACE
 /*
 C/C++ on linux/x86_64 and freebsd/x86_64
 0000 0000 1000 - 0080 0000 0000: main binary and/or MAP_32BIT mappings (512GB)
Index: compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
===================================================================
--- compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
+++ compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
@@ -99,7 +99,7 @@
     Die();
   }
 
-#if defined(__aarch64__) && defined(__APPLE__)
+#if defined(__aarch64__) && !HAS_48_BIT_ADDRESS_SPACE
   ProtectRange(HeapMemEnd(), ShadowBeg());
   ProtectRange(ShadowEnd(), MetaShadowBeg());
   ProtectRange(MetaShadowEnd(), TraceMemBeg());