--- include/unistd.h	2023-10-05 03:55:05.000000000 +0800
+++ include/unistd.h	2026-01-16 04:01:53.000000000 +0800
@@ -47,4 +47,11 @@
 #define HOST_NAME_MAX _POSIX_HOST_NAME_MAX
 #endif
 
+#ifdef __APPLE__
+#include <AvailabilityMacros.h>
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 101200
+#define MAC_OS_MKOSTEMP_FALLBACK 1
+#endif
+#endif
+
 #endif

--- src/repo.c	2026-01-14 02:38:47.000000000 +0800
+++ src/repo.c	2026-01-16 04:20:49.000000000 +0800
@@ -792,8 +792,15 @@
 
 	file = rrdp_state_filename(rr, 0);
 	temp = rrdp_state_filename(rr, 1);
-
-	if ((fd = mkostemp(temp, O_CLOEXEC)) == -1)
+#if MAC_OS_MKOSTEMP_FALLBACK
+	fd = mkstemp(temp);
+	if (fd != -1) {
+		fcntl(fd, F_SETFD, FD_CLOEXEC);
+	}
+#else
+	fd = mkostemp(temp, O_CLOEXEC)
+#endif
+	if (fd == -1)
 		goto fail;
 	(void)fchmod(fd, 0644);
 	f = fdopen(fd, "w");

--- src/output.c	2026-01-14 02:38:47.000000000 +0800
+++ src/output.c	2026-01-16 04:18:47.000000000 +0800
@@ -176,9 +176,18 @@
 	    "%s.XXXXXXXXXXX", output_name);
 	if (r < 0 || r > (int)sizeof(output_tmpname))
 		err(1, "path too long");
+#if MAC_OS_MKOSTEMP_FALLBACK
+	fd = mkstemp(output_tmpname);
+    if (fd != -1) {
+        fcntl(fd, F_SETFD, FD_CLOEXEC);
+    } else {
+		err(1, "mkstemp: %s", output_tmpname);
+    }
+#else
 	fd = mkostemp(output_tmpname, O_CLOEXEC);
 	if (fd == -1)
 		err(1, "mkostemp: %s", output_tmpname);
+#endif
 	(void) fchmod(fd, 0644);
 	f = fdopen(fd, "w");
 	if (f == NULL)