Fix “This device isn’t eligible for the requested build” Error in iTunes When Updating iOS





Advanced: Manually Editing Hosts
  • Quit out of iTunes
  • Go to the hosts file. For Mac OS X this is located at: /etc/hosts or /private/etc/hosts and in Windows it is located at: c:\windows\system32\drivers\etc\hosts
  • Open the hosts file with Administrative privileges so that changes can be made and saved (eg: sudo nano /etc/hosts)
  • Look for a line that resembles something like this:
    • 74.208.10.249 gs.apple.com
  • Put a # in front of that to comment it out, making it now look like this:
    • # 74.208.10.249 gs.apple.com
  • Save the hosts file
  • Flush DNS cache and restart iTunes
Whichever approach you took, this fixes the “eligible build” error and the iOS device will update as intended.

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