diff --git a/libc-test/build.rs b/libc-test/build.rs
index a847f46448938..7c2875d0e9056 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -239,8 +239,10 @@ fn test_apple(target: &str) {
         "netinet/ip.h",
         "netinet/tcp.h",
         "netinet/udp.h",
+        "os/clock.h",
         "os/lock.h",
         "os/signpost.h",
+        "os/os_sync_wait_on_address.h",
         "poll.h",
         "pthread.h",
         "pthread_spis.h",
diff --git a/libc-test/semver/apple.txt b/libc-test/semver/apple.txt
index a3b1c92c7d0cc..4ca721005f139 100644
--- a/libc-test/semver/apple.txt
+++ b/libc-test/semver/apple.txt
@@ -1023,6 +1023,7 @@ OFDEL
 OFILL
 OLD_TIME
 ONOEOT
+OS_CLOCK_MACH_ABSOLUTE_TIME
 OS_LOG_TYPE_DEBUG
 OS_LOG_TYPE_DEFAULT
 OS_LOG_TYPE_ERROR
@@ -1031,6 +1032,10 @@ OS_LOG_TYPE_INFO
 OS_SIGNPOST_EVENT
 OS_SIGNPOST_INTERVAL_BEGIN
 OS_SIGNPOST_INTERVAL_END
+OS_SYNC_WAKE_BY_ADDRESS_NONE
+OS_SYNC_WAKE_BY_ADDRESS_SHARED
+OS_SYNC_WAIT_ON_ADDRESS_NONE
+OS_SYNC_WAIT_ON_ADDRESS_SHARED
 OS_UNFAIR_LOCK_INIT
 OXTABS
 O_ASYNC
@@ -2049,6 +2054,7 @@ open_memstream
 open_wmemstream
 openat
 openpty
+os_clockid_t
 os_log_create
 os_log_t
 os_log_type_enabled
@@ -2058,6 +2064,13 @@ os_signpost_id_generate
 os_signpost_id_make_with_pointer
 os_signpost_id_t
 os_signpost_type_t
+os_sync_wake_by_address_any
+os_sync_wake_by_address_all
+os_sync_wake_by_address_flags_t
+os_sync_wait_on_address
+os_sync_wait_on_address_flags_t
+os_sync_wait_on_address_with_deadline
+os_sync_wait_on_address_with_timeout
 os_unfair_lock
 os_unfair_lock_assert_not_owner
 os_unfair_lock_assert_owner
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 84143e1986bfb..70019ea0b313e 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -121,6 +121,11 @@ pub type pthread_introspection_hook_t =
     extern "C" fn(event: ::c_uint, thread: ::pthread_t, addr: *mut ::c_void, size: ::size_t);
 pub type pthread_jit_write_callback_t = ::Option<extern "C" fn(ctx: *mut ::c_void) -> ::c_int>;
 
+pub type os_clockid_t = u32;
+
+pub type os_sync_wait_on_address_flags_t = u32;
+pub type os_sync_wake_by_address_flags_t = u32;
+
 pub type os_unfair_lock = os_unfair_lock_s;
 pub type os_unfair_lock_t = *mut os_unfair_lock;
 
@@ -5441,6 +5446,15 @@ pub const VOL_CAP_INT_RENAME_SWAP: attrgroup_t = 0x00040000;
 pub const VOL_CAP_INT_RENAME_EXCL: attrgroup_t = 0x00080000;
 pub const VOL_CAP_INT_RENAME_OPENFAIL: attrgroup_t = 0x00100000;
 
+// os/clock.h
+pub const OS_CLOCK_MACH_ABSOLUTE_TIME: os_clockid_t = 32;
+
+// os/os_sync_wait_on_address.h
+pub const OS_SYNC_WAIT_ON_ADDRESS_NONE: os_sync_wait_on_address_flags_t = 0x00000000;
+pub const OS_SYNC_WAIT_ON_ADDRESS_SHARED: os_sync_wait_on_address_flags_t = 0x00000001;
+pub const OS_SYNC_WAKE_BY_ADDRESS_NONE: os_sync_wake_by_address_flags_t = 0x00000000;
+pub const OS_SYNC_WAKE_BY_ADDRESS_SHARED: os_sync_wake_by_address_flags_t = 0x00000001;
+
 // <proc.h>
 /// Process being created by fork.
 pub const SIDL: u32 = 1;
@@ -5834,6 +5848,40 @@ extern "C" {
     pub fn pthread_jit_write_freeze_callbacks_np();
     pub fn pthread_cpu_number_np(cpu_number_out: *mut ::size_t) -> ::c_int;
 
+    // Available starting with macOS 14.4.
+    pub fn os_sync_wait_on_address(
+        addr: *mut ::c_void,
+        value: u64,
+        size: ::size_t,
+        flags: os_sync_wait_on_address_flags_t,
+    ) -> ::c_int;
+    pub fn os_sync_wait_on_address_with_deadline(
+        addr: *mut ::c_void,
+        value: u64,
+        size: ::size_t,
+        flags: os_sync_wait_on_address_flags_t,
+        clockid: os_clockid_t,
+        deadline: u64,
+    ) -> ::c_int;
+    pub fn os_sync_wait_on_address_with_timeout(
+        addr: *mut ::c_void,
+        value: u64,
+        size: ::size_t,
+        flags: os_sync_wait_on_address_flags_t,
+        clockid: os_clockid_t,
+        timeout_ns: u64,
+    ) -> ::c_int;
+    pub fn os_sync_wake_by_address_any(
+        addr: *mut ::c_void,
+        size: ::size_t,
+        flags: os_sync_wake_by_address_flags_t,
+    ) -> ::c_int;
+    pub fn os_sync_wake_by_address_all(
+        addr: *mut ::c_void,
+        size: ::size_t,
+        flags: os_sync_wake_by_address_flags_t,
+    ) -> ::c_int;
+
     pub fn os_unfair_lock_lock(lock: os_unfair_lock_t);
     pub fn os_unfair_lock_trylock(lock: os_unfair_lock_t) -> bool;
     pub fn os_unfair_lock_unlock(lock: os_unfair_lock_t);