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After losing my connection while downloading Xcode 4.2.1, the App Store has removed it from available updates and under purchases it says I am up to date (even though the date of the my installed version is before the latest update date). I have tried to do:

defaults write ShowDebugMenu -bool true

And then use the Debug menu item after restarting the App Store using these instructions:

Is there any other way to directly download 4.2.1 or to force the App Store to clear its cache, short of removing Xcode entirely?

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i know this will seem too obvious, but it saved me with a botched mavericks. could there be an 'install xcode' app in your applicaitons folder -- or something similar? – venicejeff Sep 5 '14 at 23:41

Click on Purchases by keeping the ⌥ key pressed (option key). It will need 10 seconds to initiate the tab (more or less), but afterwards you'll be able to re-download any purchased app.

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I found that too in the link above, but it still shows all my purchases with "installed" next to the old xcode. – Aram Kocharyan Dec 6 '11 at 9:18
Even if you wait a lot of time with the ⌥ key pressed? And what about the "Check for unfinished downloads" menu item? – Gio Dec 6 '11 at 10:33
nope, it saws all purchases complete. I think you need to uninstall before you can install a purchase... – Aram Kocharyan Dec 6 '11 at 13:19

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