diff --git a/CMakeLists.txt b/CMakeLists.txt
index bee87c82..49cb3612 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -559,7 +559,7 @@ target_link_libraries(shadps4 PRIVATE Boost::headers GPUOpen::VulkanMemoryAlloca
 
 if (APPLE)
   # Reserve system-managed memory space.
-  target_link_options(shadps4 PRIVATE -Wl,-no_pie,-no_fixup_chains,-no_huge,-pagezero_size,0x400000,-segaddr,SYSTEM_MANAGED,0x400000,-image_base,0x10000000000)
+  target_link_options(shadps4 PRIVATE -Wl,-no_pie,-no_fixup_chains,-no_huge,-pagezero_size,0x400000,-segaddr,GUEST_SYSTEM,0x400000,-image_base,0x10000000000)
 
   # Link MoltenVK for Vulkan support
   find_library(MOLTENVK MoltenVK REQUIRED)
diff --git a/src/core/address_space.cpp b/src/core/address_space.cpp
index 0cccd8c5..e492f665 100644
--- a/src/core/address_space.cpp
+++ b/src/core/address_space.cpp
@@ -16,8 +16,8 @@
 #endif
 
 #ifdef __APPLE__
-// Reserve space for the system-managed address space using a zerofill section.
-asm(".zerofill SYSTEM_MANAGED,SYSTEM_MANAGED,__system_managed,0x800000000");
+// Reserve space for the system address space using a zerofill section.
+asm(".zerofill GUEST_SYSTEM,GUEST_SYSTEM,__guest_system,0xEFFC00000");
 #endif
 
 namespace Core {
@@ -295,7 +295,7 @@ struct AddressSpace::Impl {
         // Cannot guarantee enough space for these areas at the desired addresses, so not MAP_FIXED.
         system_reserved_base = reinterpret_cast<u8*>(
             mmap(reinterpret_cast<void*>(SYSTEM_RESERVED_MIN), system_reserved_size,
-                 protection_flags, base_map_flags, -1, 0));
+                 protection_flags, base_map_flags | MAP_FIXED, -1, 0));
         user_base = reinterpret_cast<u8*>(mmap(reinterpret_cast<void*>(USER_MIN), user_size,
                                                protection_flags, base_map_flags, -1, 0));
 #else
diff --git a/src/core/address_space.h b/src/core/address_space.h
index ff48f51e..ea73e2ed 100644
--- a/src/core/address_space.h
+++ b/src/core/address_space.h
@@ -23,7 +23,12 @@ constexpr VAddr CODE_BASE_OFFSET = 0x100000000ULL;
 constexpr VAddr SYSTEM_MANAGED_MIN = 0x00000400000ULL;
 constexpr VAddr SYSTEM_MANAGED_MAX = 0x07FFFFBFFFULL;
 constexpr VAddr SYSTEM_RESERVED_MIN = 0x800000000ULL;
+#ifdef __APPLE__
+// Can only comfortably reserve the first 0x700000000 of reserved space.
+constexpr VAddr SYSTEM_RESERVED_MAX = 0xEFFFFFFFFULL;
+#else
 constexpr VAddr SYSTEM_RESERVED_MAX = 0xFFFFFFFFFULL;
+#endif
 constexpr VAddr USER_MIN = 0x1000000000ULL;
 constexpr VAddr USER_MAX = 0xFBFFFFFFFFULL;