Being asked to log into a different account to update Xcode? I wanted to update Xcode 5 to Xcode 6, but the App Store said I had updates available for other accounts. I then uninstalled Xcode but now when I go to the App Store it still says Update rather than Free?
This is most likely (well I presume) because you installed the application on another apple ID, the one it is asking you to enter. There is no way around it other then to enter it.