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I'm trying to upgrade Xcode from 4.1 to 4.2. However App Store thinks that it's already up to date, which it is not.

screenshot of App Store screenshot of Xcode

I am a registered Mac and iOS developer. I don't think 4.2 is under NDA.

How can I fix this?

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up vote 3 down vote accepted

Delete the XCode installer in /Applications, restart App Store. Now you will have an "Install" button for XCode. Download the installer and run it.

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Ah, simple and elegant solution. Nice. Thank you for a quick solution. – neoneye Nov 4 '11 at 21:31
Note that you have to go back to Xcode's page on the App Store from the search bar, Xcode 4.2 doesn't show up as an upgrade. – Robert Atkins Nov 6 '11 at 4:53

Actually, chances are the installer is for Xcode 4.2. The App Store is a bit misleading, since it doesn't actually install Xcode, but downloads the installer and puts it in /Applications/Install You still need to run the installer. The App Store knows nothing about if you've done that or not.

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