diff -u -r pam_radius-1.3.17/Makefile pam_radius-1.3.17-patch/Makefile
--- pam_radius-1.3.17/Makefile	2007-03-26 06:22:11.000000000 +0200
+++ pam_radius-1.3.17-patch/Makefile	2010-02-03 16:18:07.000000000 +0100
@@ -30,12 +30,18 @@
 #
 all: pam_radius_auth.so
 
+mac: pam_radius_auth.so_mac
+
 ######################################################################
 #
 #  Build the object file from the C source.
 #
 pam_radius_auth.o: pam_radius_auth.c pam_radius_auth.h
 	$(CC) $(CFLAGS) -c pam_radius_auth.c -o pam_radius_auth.o
+
+pam_radius_auth.o_mac: pam_radius_auth.c pam_radius_auth.h
+	$(CC) $(CFLAGS) -DMACOS -c pam_radius_auth.c -o pam_radius_auth.o
+
 #
 # This is what should work on Irix:
 #pam_radius_auth.so: pam_radius_auth.o md5.o
@@ -57,6 +63,9 @@
 pam_radius_auth.so: pam_radius_auth.o md5.o
 	ld -Bshareable pam_radius_auth.o md5.o -lpam -o pam_radius_auth.so
 
+pam_radius_auth.so_mac: pam_radius_auth.o_mac md5.o
+	ld -bundle pam_radius_auth.o md5.o /usr/lib/bundle1.o -lc -lpam -o pam_radius_auth.so 
+
 ######################################################################
 #
 #  Check a distribution out of the source tree, and make a tar file.
diff -u -r pam_radius-1.3.17/pam_radius_auth.c pam_radius-1.3.17-patch/pam_radius_auth.c
--- pam_radius-1.3.17/pam_radius_auth.c	2007-03-26 11:36:13.000000000 +0200
+++ pam_radius-1.3.17-patch/pam_radius_auth.c	2010-02-03 16:17:31.000000000 +0100
@@ -60,6 +60,10 @@
 #ifdef sun
 #include <security/pam_appl.h>
 #endif
+#ifdef MACOS
+#include <security/pam_appl.h>
+#endif
+
 #include <security/pam_modules.h>
 
 #include "pam_radius_auth.h"
@@ -355,13 +359,20 @@
     {				/* do this *always* on other platforms */
       MD5_CTX my_md5;
       struct timeval tv;
-      struct timezone tz;
+
       static unsigned int session = 0; /* make the number harder to guess */
+
+#ifndef MACOS
+
+/* MacOS doesn't have gettimofday(). Later using the uninitialized struct tv only.
+   This might mean less entropy and reduced security. Someone should review this. */
+
+      struct timezone tz;
       
       /* Use the time of day with the best resolution the system can
 	 give us -- often close to microsecond accuracy. */
       gettimeofday(&tv,&tz);
-      
+#endif      
       if (session == 0) {
 	session = getppid();	/* (possibly) hard to guess information */
       }
@@ -371,7 +382,9 @@
       /* Hash things to get maybe cryptographically strong pseudo-random numbers */
       MD5Init(&my_md5);
       MD5Update(&my_md5, (unsigned char *) &tv, sizeof(tv));
+#ifndef MACOS
       MD5Update(&my_md5, (unsigned char *) &tz, sizeof(tz));
+#endif
       MD5Final(vector, &my_md5);	      /* set the final vector */
     }
 }