make the ios development path less mandatory
diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
new file mode 100644
index 0000000..47f5e79
--- /dev/null
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -0,0 +1,14 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import '../base/context.dart';
+import '../base/process.dart';
+
+class XCode {
+ static void initGlobal() {
+ context[XCode] = new XCode();
+ }
+
+ bool get isInstalled => exitsHappy(<String>['xcode-select', '--print-path']);
+}
