diff -uNr anaconda-21.48.22.56__orig/pyanaconda/packaging/yumpayload.py anaconda-21.48.22.56/pyanaconda/packaging/yumpayload.py
--- anaconda-21.48.22.56__orig/pyanaconda/packaging/yumpayload.py	2015-10-29 14:23:19.000000000 +0000
+++ anaconda-21.48.22.56/pyanaconda/packaging/yumpayload.py	2015-12-07 17:36:49.070000000 +0000
@@ -481,12 +481,16 @@
     @property
     def mirrorEnabled(self):
         with _yum_lock:
-            # yum initializes with plugins disabled, and when plugins are disabled
-            # _yum.plugins is a DummyYumPlugins object, which has no useful attributes.
-            if hasattr(self._yum.plugins, "_plugins"):
-                return "fastestmirror" in self._yum.plugins._plugins
+            # we just skip this on CentOS since we cant support it yet
+            if productName.startswith("CentOS"):
+              return False
             else:
-                return False
+              # yum initializes with plugins disabled, and when plugins are disabled
+              # _yum.plugins is a DummyYumPlugins object, which has no useful attributes.
+              if hasattr(self._yum.plugins, "_plugins"):
+                  return "fastestmirror" in self._yum.plugins._plugins
+              else:
+                  return False
 
     def getRepo(self, repo_id):
         """ Return the yum repo object. """