diff --git a/libc-test/build.rs b/libc-test/build.rs
index 5376c46860d6d..3611ae092394b 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -232,6 +232,7 @@ fn test_apple(target: &str) {
         "netinet/tcp.h",
         "netinet/udp.h",
         "os/lock.h",
+        "os/signpost.h",
         "poll.h",
         "pthread.h",
         "pthread_spis.h",
diff --git a/libc-test/semver/apple.txt b/libc-test/semver/apple.txt
index 83cd77d9a23db..723541817468c 100644
--- a/libc-test/semver/apple.txt
+++ b/libc-test/semver/apple.txt
@@ -1003,6 +1003,14 @@ OFDEL
 OFILL
 OLD_TIME
 ONOEOT
+OS_LOG_TYPE_DEBUG
+OS_LOG_TYPE_DEFAULT
+OS_LOG_TYPE_ERROR
+OS_LOG_TYPE_FAULT
+OS_LOG_TYPE_INFO
+OS_SIGNPOST_EVENT
+OS_SIGNPOST_INTERVAL_BEGIN
+OS_SIGNPOST_INTERVAL_END
 OS_UNFAIR_LOCK_INIT
 OXTABS
 O_ASYNC
@@ -1994,6 +2002,15 @@ open_memstream
 open_wmemstream
 openat
 openpty
+os_log_create
+os_log_t
+os_log_type_t
+os_log_type_enabled
+os_signpost_enabled
+os_signpost_id_generate
+os_signpost_id_make_with_pointer
+os_signpost_id_t
+os_signpost_type_t
 os_unfair_lock
 os_unfair_lock_s
 os_unfair_lock_t
diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index a9438ef57a3c2..1267b8045ef65 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -124,6 +124,11 @@ pub type pthread_jit_write_callback_t = ::Option<extern "C" fn(ctx: *mut ::c_voi
 pub type os_unfair_lock = os_unfair_lock_s;
 pub type os_unfair_lock_t = *mut os_unfair_lock;
 
+pub type os_log_t = *mut ::c_void;
+pub type os_log_type_t = u8;
+pub type os_signpost_id_t = u64;
+pub type os_signpost_type_t = u8;
+
 pub type vm_statistics_t = *mut vm_statistics;
 pub type vm_statistics_data_t = vm_statistics;
 pub type vm_statistics64_t = *mut vm_statistics64;
@@ -3895,6 +3900,16 @@ pub const OS_UNFAIR_LOCK_INIT: os_unfair_lock = os_unfair_lock {
     _os_unfair_lock_opaque: 0,
 };
 
+pub const OS_LOG_TYPE_DEFAULT: ::os_log_type_t = 0x00;
+pub const OS_LOG_TYPE_INFO: ::os_log_type_t = 0x01;
+pub const OS_LOG_TYPE_DEBUG: ::os_log_type_t = 0x02;
+pub const OS_LOG_TYPE_ERROR: ::os_log_type_t = 0x10;
+pub const OS_LOG_TYPE_FAULT: ::os_log_type_t = 0x11;
+
+pub const OS_SIGNPOST_EVENT: ::os_signpost_type_t = 0x00;
+pub const OS_SIGNPOST_INTERVAL_BEGIN: ::os_signpost_type_t = 0x01;
+pub const OS_SIGNPOST_INTERVAL_END: ::os_signpost_type_t = 0x02;
+
 pub const MINSIGSTKSZ: ::size_t = 32768;
 pub const SIGSTKSZ: ::size_t = 131072;
 
@@ -5259,6 +5274,15 @@ extern "C" {
     pub fn os_unfair_lock_assert_owner(lock: os_unfair_lock_t);
     pub fn os_unfair_lock_assert_not_owner(lock: os_unfair_lock_t);
 
+    pub fn os_log_create(subsystem: *const ::c_char, category: *const ::c_char) -> ::os_log_t;
+    pub fn os_log_type_enabled(oslog: ::os_log_t, tpe: ::os_log_type_t) -> bool;
+    pub fn os_signpost_id_make_with_pointer(
+        log: ::os_log_t,
+        ptr: *const ::c_void,
+    ) -> ::os_signpost_id_t;
+    pub fn os_signpost_id_generate(log: ::os_log_t) -> ::os_signpost_id_t;
+    pub fn os_signpost_enabled(log: ::os_log_t) -> bool;
+
     pub fn thread_policy_set(
         thread: thread_t,
         flavor: thread_policy_flavor_t,