golang
diff --git a/‎unix/darwin_arm64_test.go
+1-1 b/‎unix/darwin_arm64_test.go
+1-1
diff --git a/‎unix/syscall_darwin.go
+5-1 b/‎unix/syscall_darwin.go
+5-1
diff --git a/‎unix/zerrors_darwin_amd64.go
+136-5 b/‎unix/zerrors_darwin_amd64.go
+136-5
diff --git a/‎unix/zerrors_darwin_arm64.go
+136-5 b/‎unix/zerrors_darwin_arm64.go
+136-5
diff --git a/‎unix/zsyscall_darwin_amd64.go
+20-20 b/‎unix/zsyscall_darwin_amd64.go
+20-20
diff --git a/‎unix/zsyscall_darwin_amd64.s
+5-5 b/‎unix/zsyscall_darwin_amd64.s
+5-5
diff --git a/‎unix/zsyscall_darwin_arm64.go
-20 b/‎unix/zsyscall_darwin_arm64.go
-20
diff --git a/‎unix/zsyscall_darwin_arm64.s
-5 b/‎unix/zsyscall_darwin_arm64.s
-5
diff --git a/‎unix/ztypes_darwin_amd64.go
+2-7 b/‎unix/ztypes_darwin_amd64.go
+2-7
diff --git a/‎unix/ztypes_darwin_arm64.go
+2-7 b/‎unix/ztypes_darwin_arm64.go
+2-7
@@ -576,6 +576,10 @@ func PthreadFchdir(fd int) (err error) {
 //
 // On success, Connectx returns the number of bytes enqueued for transmission.
 func Connectx(fd int, srcIf uint32, srcAddr, dstAddr Sockaddr, associd SaeAssocID, flags uint32, iov []Iovec, connid *SaeConnID) (n uintptr, err error) {
+	if !darwinKernelVersionMin(15, 0, 0) {
+		return 0, ENOSYS
+	}
+
 	endpoints := SaEndpoints{
 		Srcif: srcIf,
 	}
@@ -602,7 +606,6 @@ func Connectx(fd int, srcIf uint32, srcAddr, dstAddr Sockaddr, associd SaeAssocI
 	return
 }
 
-// sys	connectx(fd int, endpoints *SaEndpoints, associd SaeAssocID, flags uint32, iov []Iovec, n *uintptr, connid *SaeConnID) (err error)
 const minIovec = 8
 
 func Readv(fd int, iovs [][]byte) (n int, err error) {
@@ -852,3 +855,4 @@ func darwinKernelVersionMin(maj, min, patch int) bool {
 //sys	preadv(fd int, iovecs []Iovec, offset int64) (n int, err error)
 //sys	writev(fd int, iovecs []Iovec) (n int, err error)
 //sys	pwritev(fd int, iovecs []Iovec, offset int64) (n int, err error)
+//sys	connectx(fd int, endpoints *SaEndpoints, associd SaeAssocID, flags uint32, iov []Iovec, n *uintptr, connid *SaeConnID) (err error)
@@ -248,11 +248,6 @@ TEXT libc_pthread_fchdir_np_trampoline<>(SB),NOSPLIT,$0-0
 GLOBL	·libc_pthread_fchdir_np_trampoline_addr(SB), RODATA, $8
 DATA	·libc_pthread_fchdir_np_trampoline_addr(SB)/8, $libc_pthread_fchdir_np_trampoline<>(SB)
 
-TEXT libc_connectx_trampoline<>(SB),NOSPLIT,$0-0
-	JMP	libc_connectx(SB)
-GLOBL	·libc_connectx_trampoline_addr(SB), RODATA, $8
-DATA	·libc_connectx_trampoline_addr(SB)/8, $libc_connectx_trampoline<>(SB)
-
 TEXT libc_sendfile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
 GLOBL	·libc_sendfile_trampoline_addr(SB), RODATA, $8
@@ -758,6 +753,11 @@ TEXT libc_pwritev_trampoline<>(SB),NOSPLIT,$0-0
 GLOBL	·libc_pwritev_trampoline_addr(SB), RODATA, $8
 DATA	·libc_pwritev_trampoline_addr(SB)/8, $libc_pwritev_trampoline<>(SB)
 
+TEXT libc_connectx_trampoline<>(SB),NOSPLIT,$0-0
+	JMP	libc_connectx(SB)
+GLOBL	·libc_connectx_trampoline_addr(SB), RODATA, $8
+DATA	·libc_connectx_trampoline_addr(SB)/8, $libc_connectx_trampoline<>(SB)
+
 TEXT libc_fstat64_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_fstat64(SB)
 GLOBL	·libc_fstat64_trampoline_addr(SB), RODATA, $8
 
@@ -248,11 +248,6 @@ TEXT libc_pthread_fchdir_np_trampoline<>(SB),NOSPLIT,$0-0
 GLOBL	·libc_pthread_fchdir_np_trampoline_addr(SB), RODATA, $8
 DATA	·libc_pthread_fchdir_np_trampoline_addr(SB)/8, $libc_pthread_fchdir_np_trampoline<>(SB)
 
-TEXT libc_connectx_trampoline<>(SB),NOSPLIT,$0-0
-	JMP	libc_connectx(SB)
-GLOBL	·libc_connectx_trampoline_addr(SB), RODATA, $8
-DATA	·libc_connectx_trampoline_addr(SB)/8, $libc_connectx_trampoline<>(SB)
-
 TEXT libc_sendfile_trampoline<>(SB),NOSPLIT,$0-0
 	JMP	libc_sendfile(SB)
 GLOBL	·libc_sendfile_trampoline_addr(SB), RODATA, $8