--- libportal/notification.c	2025-02-12 18:38:40.000000000 +0800
+++ libportal/notification.c	2025-05-21 23:36:36.000000000 +0800
@@ -24,6 +24,10 @@
 
 #include "config.h"
 
+#ifndef __APPLE__
+#define HAVE_MEMFD_CREATE 1
+#endif
+
 #define _GNU_SOURCE
 #include <sys/mman.h>
 #include <fcntl.h>
@@ -82,7 +86,15 @@
   gpointer shm;
   gsize bytes_len;
 
+#if HAVE_MEMFD_CREATE
   fd = memfd_create (name, MFD_ALLOW_SEALING);
+#else
+  char tmpname[] = "/tmp/notification-XXXXXX";
+  fd = mkstemp(tmpname);
+  if (fd != -1) {
+    unlink(tmpname);
+  }
+#endif
   if (fd == -1)
     {
       int saved_errno = errno;
@@ -328,7 +340,15 @@
         {
           g_autofd int fd = -1;
 
+#if HAVE_MEMFD_CREATE
           fd = memfd_create ("notification-media", MFD_ALLOW_SEALING);
+#else
+          char tmpname[] = "/tmp/notification-media-XXXXXX";
+          fd = mkstemp(tmpname);
+          if (fd != -1) {
+            unlink(tmpname);
+          }
+#endif
           if (fd == -1)
             {
               int saved_errno = errno;