..I was trying to install the Google Cloud Messaging for Android Library, from the Extra in Android SDK Manager.
Since it did not appear, I updateded the Android SDK Tools and the Android SDK Platform-Tools to the last release (as shown here: How Google Cloud Messaging Service in Android Works?).
Once updated both, I still could not find any Extras--> Google Cloud Messaging for Android Library (just "Intel Hardware Accelerated Execution Manager"). So I updated Eclipse (version 3.6) too (Help->Check for Updates), but nothing happened except for the fact that the ADT plugin was not there anymore: no Android menu under Preferences, no possibilty to create Android projects and so on.
I uninstelled the plugin, removed the files from the plugin directory, installed another version of Eclipse (3.8) with the addition of the plugin but nothing changed.
Any ideas?
I'm working on a Mac OS X Leopard.