diff --git a/compiler/rustc_target/src/spec/x86_64_apple_ios.rs b/compiler/rustc_target/src/spec/x86_64_apple_ios.rs
index 1dcb47056a4..061b6a96fc8 100644
--- a/compiler/rustc_target/src/spec/x86_64_apple_ios.rs
+++ b/compiler/rustc_target/src/spec/x86_64_apple_ios.rs
@@ -13,7 +13,7 @@ pub fn target() -> Target {
             .into(),
         arch: arch.target_arch(),
         options: TargetOptions {
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(128),
             stack_probes: StackProbeType::X86,
             ..base
         },
diff --git a/compiler/rustc_target/src/spec/x86_64_apple_ios_macabi.rs b/compiler/rustc_target/src/spec/x86_64_apple_ios_macabi.rs
index 9f3b0fab697..50f359c357b 100644
--- a/compiler/rustc_target/src/spec/x86_64_apple_ios_macabi.rs
+++ b/compiler/rustc_target/src/spec/x86_64_apple_ios_macabi.rs
@@ -15,7 +15,7 @@ pub fn target() -> Target {
             .into(),
         arch: arch.target_arch(),
         options: TargetOptions {
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(128),
             stack_probes: StackProbeType::X86,
             ..base
         },
diff --git a/compiler/rustc_target/src/spec/x86_64_apple_tvos.rs b/compiler/rustc_target/src/spec/x86_64_apple_tvos.rs
index 550ce0b9ce5..76de7d20c4c 100644
--- a/compiler/rustc_target/src/spec/x86_64_apple_tvos.rs
+++ b/compiler/rustc_target/src/spec/x86_64_apple_tvos.rs
@@ -9,7 +9,7 @@ pub fn target() -> Target {
         data_layout: "e-m:o-i64:64-f80:128-n8:16:32:64-S128".into(),
         arch: arch.target_arch(),
         options: TargetOptions {
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(128),
             stack_probes: StackProbeType::X86,
             ..opts("tvos", arch)
         },
diff --git a/compiler/rustc_target/src/spec/x86_64_apple_watchos_sim.rs b/compiler/rustc_target/src/spec/x86_64_apple_watchos_sim.rs
index 75ce02cba1d..5fcc00a86ff 100644
--- a/compiler/rustc_target/src/spec/x86_64_apple_watchos_sim.rs
+++ b/compiler/rustc_target/src/spec/x86_64_apple_watchos_sim.rs
@@ -10,7 +10,7 @@ pub fn target() -> Target {
             .into(),
         arch: arch.target_arch(),
         options: TargetOptions {
-            max_atomic_width: Some(64),
+            max_atomic_width: Some(128),
             stack_probes: StackProbeType::X86,
             forces_embed_bitcode: true,
             // Taken from a clang build on Xcode 11.4.1.