Appendix C. Installing and Running Google App Engine on a Macintosh System
This appendix describes the installation of the Google App Engine Software Development Kit (SDK) on a Macintosh and running a simple “Hello, world” application.
The App Engine SDK allows you to run Google App Engine Applications on your local computer. It simulates the runtime environment of the Google App Engine infrastructure.
Download and Install
Download the appropriate install package for the Google App Engine SDK from http://code.google.com/appengine/downloads.html, as shown in Figure C-1.

Download the Mac OS X installer. It should automatically mount as a virtual drive (Figure C-2).

Drag the GoogleAppEngineLauncher to the Applications folder on your hard drive. This step copies Google App Engine and installs it as an application on your system. Once this is done, you can eject the virtual drive.
Navigate to the /Applications folder on your main disk, find the AppEngineLauncher icon, and launch it. You may need to scroll to the bottom of your screen to see the App Engine icon.
Click Accept or Open in any dialog box that asks whether it is OK to launch, as shown in Figure C-3.
When the Engine ...
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