Added str method to mac_osx so that whenever we try to access darwins different operating systems we can grab the name correctly. This avoids having to worry whether we have a version attached to it or not.

lib/spack/spack/operating_systems/mac_osx.py

@@ -21,9 +21,8 @@ def __init__(self):
                         "10.11": "elcapitan"}     
 
         mac_ver = py_platform.mac_ver()[0][:-2]
-        try:
-            name = mac_releases[mac_ver]
-        except KeyError:
-            name = "mac_os"
-
+        name = mac_releases.get(mac_ver, "mac_osx")
         super(MacOsx, self).__init__(name, mac_ver)
+
+    def __str__(self):
+        return self.name

lib/spack/spack/platforms/darwin.py

@@ -13,11 +13,11 @@ def __init__(self):
         self.add_target(self.default, Target(self.default))
         mac_os = MacOsx()
         
-        self.default_os = mac_os.name
-        self.front_os = mac_os.name
-        self.back_os =  mac_os.name 
+        self.default_os = str(mac_os)
+        self.front_os   = str(mac_os)
+        self.back_os    = str(mac_os)
 
-        self.add_operating_system(mac_os.name, mac_os)
+        self.add_operating_system(str(mac_os), mac_os)
 
     @classmethod
     def detect(self):