xcode_settings are for mac only

No need to wrap the section in a conditional

binding.gyp

@@ -24,6 +24,14 @@
            'SetChecksum': 'true'
         }
       },
+      'xcode_settings': {
+        'OTHER_CPLUSPLUSFLAGS': [
+          '-std=c++11'
+        ],
+        'OTHER_LDFLAGS': [],
+        'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',
+        'MACOSX_DEPLOYMENT_TARGET': '10.7'
+      },
       'include_dirs': [
         '<!(node -e "require(\'nan\')")',
       ],
@@ -59,16 +67,6 @@
             ],
           }
         }],
-        ['OS=="mac"', {
-          'xcode_settings': {
-            'OTHER_CPLUSPLUSFLAGS': [
-              '-std=c++11'
-            ],
-            'OTHER_LDFLAGS': [],
-            'GCC_ENABLE_CPP_EXCEPTIONS': 'NO',
-            'MACOSX_DEPLOYMENT_TARGET': '10.7'
-          }
-        }],
         ['OS=="win" and MSVS_VERSION == "2015"', {
           'msvs_settings': {
             'VCCLCompilerTool': {