diff --git a/h3_ffmpeg.c b/h3_ffmpeg.c
index 66762425..b051cf18 100644
--- a/h3_ffmpeg.c
+++ b/h3_ffmpeg.c
@@ -1,6 +1,7 @@
 #include "h3_ffmpeg.h"
 
 #include <errno.h>
+#include <limits.h>
 #include <pthread.h>
 #include <signal.h>
 #include <spawn.h>
diff --git a/h3_metal.m b/h3_metal.m
index 85e1d4c4..ea0de6bc 100644
--- a/h3_metal.m
+++ b/h3_metal.m
@@ -39,9 +39,11 @@ int h3_metal_probe(h3_device_info *info, char *error, size_t error_size) {
                 break;
             }
         }
+#if defined(__MAC_OS_X_VERSION_MAX_ALLOWED) && __MAC_OS_X_VERSION_MAX_ALLOWED >= 260000
         if (@available(macOS 26.0, *)) {
             info->metal4 = [device supportsFamily:MTLGPUFamilyMetal4] ? 1 : 0;
         }
+#endif
     }
     return 1;
 }