diff -uNr libdvdnav-0.1.9/src/bswap.h libdvdnav-0.1.9-new/src/bswap.h
--- libdvdnav-0.1.9/src/bswap.h	Tue Apr 29 14:31:35 2003
+++ libdvdnav-0.1.9-new/src/bswap.h	Sat Nov 13 17:37:08 2004
@@ -59,6 +59,12 @@
 #define B2N_32(x) x = be32toh(x)
 #define B2N_64(x) x = be64toh(x)
 
+#elif defined(__DARWIN__)
+#include <limits.h>
+#define B2N_16(x) NXSwapShort(x)
+#define B2N_32(x) NXSwapInt(x)
+#define B2N_64(x) NXSwapLongLong(x)
+
 /* This is a slow but portable implementation, it has multiple evaluation 
  * problems so beware.
  * Old FreeBSD's and Solaris don't have <byteswap.h> or any other such 
diff -uNr libdvdnav-0.1.9/src/vm.c libdvdnav-0.1.9-new/src/vm.c
--- libdvdnav-0.1.9/src/vm.c	Tue Apr 29 10:25:20 2003
+++ libdvdnav-0.1.9-new/src/vm.c	Sat Nov 13 17:44:18 2004
@@ -45,6 +45,8 @@
 #ifdef _MSC_VER
 #include <io.h>   /* read() */
 #define lseek64 lseek
+#elif defined(__DARWIN__)
+#define lseek64 lseek
 #endif /* _MSC_VER */
 
 /*
@@ -128,7 +130,7 @@
 
 static void dvd_read_name(char *name, const char *device) {
     int fd, i;
-#if !defined(__FreeBSD__) && !defined(WIN32)
+#if !defined(__FreeBSD__) && !defined(WIN32) && !defined(__DARWIN__)
     off64_t off;
 #else
     off_t off;