diff -r 98475e024344 Lib/_osx_support.py
--- a/Lib/_osx_support.py   Fri May 30 16:28:00 2014 -0400
+++ b/Lib/_osx_support.py   Mon Apr 13 16:38:23 2015 -0400
@@ -3,6 +3,7 @@
 import os
 import re
 import sys
+from distutils.version import StrictVersion

 __all__ = [
     'compiler_fixup',
@@ -450,7 +451,10 @@
         # case and disallow installs.
         cflags = _config_vars.get(_INITPRE+'CFLAGS',
                                     _config_vars.get('CFLAGS', ''))
-        if ((macrelease + '.') >= '10.4.' and
+        # Doing string comparison on version leads to 10.10 < 10.4 == True
+        macrelease_cmp = StrictVersion(macrelease)
+        version_to_cmp_to = StrictVersion('10.4')
+        if (macrelease_cmp >= version_to_cmp_to and
             '-arch' in cflags.strip()):
             # The universal build will build fat binaries, but not on
             # systems before 10.4