diff -Naur ../../ruby.orig/ruby/ext/digest/md5/extconf.rb ./ext/digest/md5/extconf.rb
--- ../../ruby.orig/ruby/ext/digest/md5/extconf.rb	2012-01-12 01:00:01.000000000 -0800
+++ ./ext/digest/md5/extconf.rb	2012-01-12 01:01:55.000000000 -0800
@@ -10,13 +10,13 @@
 
 dir_config("openssl")
 
-if !with_config("bundled-md5") &&
-    have_library("crypto") && have_header("openssl/md5.h")
-  $objs << "md5ossl.#{$OBJEXT}"
-
-else
-  $objs << "md5.#{$OBJEXT}"
-end
+#if !with_config("bundled-md5") &&
+    #have_library("crypto") && have_header("openssl/md5.h")
+  #$objs << "md5ossl.#{$OBJEXT}"
+
+#else
+  $objs << "md5cc.#{$OBJEXT}"
+#end
 
 have_header("sys/cdefs.h")
 
diff -Naur ../../ruby.orig/ruby/ext/digest/md5/md5cc.c ./ext/digest/md5/md5cc.c
--- ../../ruby.orig/ruby/ext/digest/md5/md5cc.c	1969-12-31 16:00:00.000000000 -0800
+++ ./ext/digest/md5/md5cc.c	2012-01-12 01:16:16.000000000 -0800
@@ -0,0 +1,7 @@
+#include "md5cc.h"
+
+void
+MD5_Finish(MD5_CTX *pctx, unsigned char *digest)
+{
+	CC_MD5_Final(digest, pctx);
+}
diff -Naur ../../ruby.orig/ruby/ext/digest/md5/md5cc.h ./ext/digest/md5/md5cc.h
--- ../../ruby.orig/ruby/ext/digest/md5/md5cc.h	1969-12-31 16:00:00.000000000 -0800
+++ ./ext/digest/md5/md5cc.h	2012-01-12 01:09:05.000000000 -0800
@@ -0,0 +1,18 @@
+#ifndef MD5CC_H_INCLUDED
+#define MD5CC_H_INCLUDED
+
+#include <stddef.h>
+#include <CommonCrypto/CommonDigest.h>
+
+#define MD5_CTX		CC_MD5_CTX
+
+#define MD5_DIGEST_LENGTH	CC_MD5_DIGEST_LENGTH
+#define MD5_BLOCK_LENGTH	CC_MD5_BLOCK_BYTES
+
+#define MD5_Init CC_MD5_Init
+#define MD5_Update CC_MD5_Update
+#define MD5_Finish CC_MD5_Finish
+
+void MD5_Finish(MD5_CTX *pctx, unsigned char *digest);
+
+#endif
diff -Naur ../../ruby.orig/ruby/ext/digest/md5/md5init.c ./ext/digest/md5/md5init.c
--- ../../ruby.orig/ruby/ext/digest/md5/md5init.c	2007-02-12 15:01:19.000000000 -0800
+++ ./ext/digest/md5/md5init.c	2012-01-12 01:02:41.000000000 -0800
@@ -2,7 +2,9 @@
 /* $Id: md5init.c 11708 2007-02-12 23:01:19Z shyouhei $ */
 
 #include "digest.h"
-#if defined(HAVE_OPENSSL_MD5_H)
+#if defined (__APPLE__)
+#include "md5cc.h"
+#elif defined(HAVE_OPENSSL_MD5_H)
 #include "md5ossl.h"
 #else
 #include "md5.h"