I left my Mac overnight to update it from the App Store, and the next morning I still had a spinning disk! I followed the advice given above and it worked:
1. Go to developer.apple.com. 2.Login 3. Go to the downloads (do not click on xcode yet) 4. Browse all downloads 5. Now go to find the required version of xcode 6. Download the .dmg file
Respect for Peter Gigadlo.
user3092871
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