Fix TravisCI failure on python 2.4

system/osx_defaults.py

@@ -209,7 +209,10 @@ class OSXDefaults(object):
 
         # We need to convert some values so the defaults commandline understands it
         if type(self.value) is bool:
-            value = "TRUE" if self.value else "FALSE"
+            if self.value:
+                value = "TRUE"
+            else:
+                value = "FALSE"
         elif type(self.value) is int or type(self.value) is float:
             value = str(self.value)
         elif self.array_add and self.current_value is not None: