diff --git a/unix/example_sysvshm_test.go b/unix/example_sysvshm_test.go
index 537f770..66ef2ed 100644
--- a/unix/example_sysvshm_test.go
+++ b/unix/example_sysvshm_test.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (darwin && amd64) || (linux && !android)
-// +build darwin,amd64 linux,!android
+//go:build (darwin && !ios) || (linux && !android)
+// +build darwin,!ios linux,!android
 
 package unix_test
 
@@ -14,7 +14,6 @@
 )
 
 func ExampleSysvShmGet() {
-
 	// create shared memory region of 1024 bytes
 	id, err := unix.SysvShmGet(unix.IPC_PRIVATE, 1024, unix.IPC_CREAT|unix.IPC_EXCL|0o600)
 	if err != nil {
diff --git a/unix/sysvshm_unix.go b/unix/sysvshm_unix.go
index 7d6ba36..0bb4c8d 100644
--- a/unix/sysvshm_unix.go
+++ b/unix/sysvshm_unix.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (darwin && amd64) || linux
-// +build darwin,amd64 linux
+//go:build (darwin && !ios) || linux
+// +build darwin,!ios linux
 
 package unix
 
diff --git a/unix/sysvshm_unix_other.go b/unix/sysvshm_unix_other.go
index 579b53b..71bddef 100644
--- a/unix/sysvshm_unix_other.go
+++ b/unix/sysvshm_unix_other.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build (darwin && amd64)
-// +build darwin,amd64
+//go:build darwin && !ios
+// +build darwin,!ios
 
 package unix
 
diff --git a/unix/zsyscall_darwin_arm64.go b/unix/zsyscall_darwin_arm64.go
index f2ee2bd..cf71be3 100644
--- a/unix/zsyscall_darwin_arm64.go
+++ b/unix/zsyscall_darwin_arm64.go
@@ -734,6 +734,65 @@
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func shmat(id int, addr uintptr, flag int) (ret uintptr, err error) {
+	r0, _, e1 := syscall_syscall(libc_shmat_trampoline_addr, uintptr(id), uintptr(addr), uintptr(flag))
+	ret = uintptr(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+var libc_shmat_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_shmat shmat "/usr/lib/libSystem.B.dylib"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func shmctl(id int, cmd int, buf *SysvShmDesc) (result int, err error) {
+	r0, _, e1 := syscall_syscall(libc_shmctl_trampoline_addr, uintptr(id), uintptr(cmd), uintptr(unsafe.Pointer(buf)))
+	result = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+var libc_shmctl_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_shmctl shmctl "/usr/lib/libSystem.B.dylib"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func shmdt(addr uintptr) (err error) {
+	_, _, e1 := syscall_syscall(libc_shmdt_trampoline_addr, uintptr(addr), 0, 0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+var libc_shmdt_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_shmdt shmdt "/usr/lib/libSystem.B.dylib"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
+func shmget(key int, size int, flag int) (id int, err error) {
+	r0, _, e1 := syscall_syscall(libc_shmget_trampoline_addr, uintptr(key), uintptr(size), uintptr(flag))
+	id = int(r0)
+	if e1 != 0 {
+		err = errnoErr(e1)
+	}
+	return
+}
+
+var libc_shmget_trampoline_addr uintptr
+
+//go:cgo_import_dynamic libc_shmget shmget "/usr/lib/libSystem.B.dylib"
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func Access(path string, mode uint32) (err error) {
 	var _p0 *byte
 	_p0, err = BytePtrFromString(path)
diff --git a/unix/ztypes_darwin_arm64.go b/unix/ztypes_darwin_arm64.go
index 96f0e6a..c17f45c 100644
--- a/unix/ztypes_darwin_arm64.go
+++ b/unix/ztypes_darwin_arm64.go
@@ -639,3 +639,39 @@
 	Ngroups int16
 	Groups  [16]uint32
 }
+
+type SysvIpcPerm struct {
+	Uid  uint32
+	Gid  uint32
+	Cuid uint32
+	Cgid uint32
+	Mode uint16
+	_    uint16
+	_    int32
+}
+type SysvShmDesc struct {
+	Perm   SysvIpcPerm
+	Segsz  uint64
+	Lpid   int32
+	Cpid   int32
+	Nattch uint16
+	_      [34]byte
+}
+
+const (
+	IPC_CREAT   = 0x200
+	IPC_EXCL    = 0x400
+	IPC_NOWAIT  = 0x800
+	IPC_PRIVATE = 0x0
+)
+
+const (
+	IPC_RMID = 0x0
+	IPC_SET  = 0x1
+	IPC_STAT = 0x2
+)
+
+const (
+	SHM_RDONLY = 0x1000
+	SHM_RND    = 0x2000
+)