diff --git Source/WTF/wtf/spi/darwin/ProcessMemoryFootprint.h Source/WTF/wtf/spi/darwin/ProcessMemoryFootprint.h
index 90852df6..525ace42 100644
--- Source/WTF/wtf/spi/darwin/ProcessMemoryFootprint.h
+++ Source/WTF/wtf/spi/darwin/ProcessMemoryFootprint.h
@@ -27,7 +27,7 @@
 
 #if OS(DARWIN)
 
-#if !PLATFORM(IOS_FAMILY_SIMULATOR) && __has_include(<libproc.h>)
+#if !PLATFORM(IOS_FAMILY_SIMULATOR) && __has_include(<libproc.h>) && (__MAC_OS_X_VERSION_MIN_REQUIRED >= 1090)
 #    include <libproc.h>
 #    if RUSAGE_INFO_CURRENT >= 4
 #        define HAS_MAX_FOOTPRINT