Mensagem original de: Beerbal Kumar Sharma ,
6. Navigate using the arrow keys and look for an entry containing “gs.apple.com”. If you don't see any entry containing gs.apple.com, then the hosts file isn't related to the issue. Close the Terminal and move on to the next section of this article, "Address TCP/IP filtering, firewall, or security software." 7. Add the # symbol and a space ("# ") to the beginning of the gs.apple.com entry. 8. Press Control-O to save the file. 9. Press Return when asked for the filename. 10. Press Control-X to exit the editor. 11. Restart your Mac. After your computer is finished restarting, try to update or restore your iOS device again. Address TCP/IP filtering, firewall, or security software If you have TCP/IP filtering, firewall, or security software installed on your computer, try these steps. Configure or temporarily uninstall your security software. Be sure you have a working Internet connection. Try visiting www.apple.com or contact your Internet service provider for more help. Bypass your Internet router. Some routers might block iTunes from accessing the update server. If you're using a router that isn't manufactured by Apple, try the following: Disconnect from your wired or wireless router and use an Ethernet cable to connect your computer directly to your modem. Restart your computer and modem. Contact your Internet service provider for instructions on using your modem. After you confirm your Internet connection is working, try to update or restore your iOS device again.