I had similar problem. You may need to update and install latest fixes to eclipse.
Eclipse->Preferences->Install/Updates->Automatic Updates Click 'Automatically find new updates and notify me', select 'Look for updates each time platform is started' Restart eclipse. You should see at the bottom of the startup screen eclipse updating. Wait until you see no more updates. Now, try to install ADT plugins. Resolved my problem on Mac OS X 10.5.6 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
