diff -ru libdvdnav-0.1.10.orig/src/dvdread/bswap.h libdvdnav-0.1.10/src/dvdread/bswap.h
--- libdvdnav-0.1.10.orig/src/dvdread/bswap.h	2004-01-11 16:43:13.000000000 -0500
+++ libdvdnav-0.1.10/src/dvdread/bswap.h	2006-03-02 20:38:09.000000000 -0500
@@ -84,6 +84,12 @@
       (((x) & 0x000000000000ff00) << 40) | \
       (((x) & 0x00000000000000ff) << 56))
 
+#elif defined(__APPLE__)
+#include <libkern/OSByteOrder.h>
+#define B2N_16(x) x = OSSwapInt16(x)
+#define B2N_32(x) x = OSSwapInt32(x)
+#define B2N_64(x) x = OSSwapInt64(x)
+
 #else
 
 /* If there isn't a header provided with your system with this functionality