Update README.md

packages/flutter/README.md

@@ -3,7 +3,9 @@ Getting started with Sky
 
 Sky apps are written in Dart. To get started, we need to set up Dart SDK:
 
- - Install the [Dart SDK](https://www.dartlang.org/downloads/).
+ - Install the [Dart SDK](https://www.dartlang.org/downloads/):
+   - Mac: `brew tap dart-lang/dart && brew install dart`
+   - Linux, see [https://www.dartlang.org/downloads/linux.html](https://www.dartlang.org/downloads/linux.html)
  - Ensure that `$DART_SDK` is set to the path of your Dart SDK and that the
    `dart` and `pub` executables are on your `$PATH`.
 
@@ -50,9 +52,9 @@ Setup your Android device
 Currently Sky requires an Android device running the Lollipop (or newer) version
 of the Android operating system.
 
- - Install the `adb` tool from the [Android SDK](https://developer.android.com/sdk/installing/index.html)
-   and ensure that `adb` (inside `platform-tools` in the Android SDK) is in your
-   `$PATH`.
+ - Install the `adb` tool from the [Android SDK](https://developer.android.com/sdk/installing/index.html?pkg=tools):
+  - Mac: `brew install android-platform-tools`
+  - Linux: `sudo apt-get install android-tools-adb`
 
  - Enable developer mode on your device by visiting `Settings > About phone`
    and tapping the `Build number` field five times.