Error 3194 or "This device isn't eligible for the requested build"
You might see one of these messages in iTunes if it can’t communicate with the update server.
- Error 3194
- This device isn't eligible for the requested build
Important: If you see one of these messages and need help updating or restoring your iOS device, Install the latest version of iTunes and try to update or restore again. After that, follow these steps if you need more help.
Check your "hosts" file
After you've updated iTunes to the latest version, you can check the hosts file to be sure your computer can contact the update server. Use the numbered steps below if you’re on a Mac.
If you’re using a Windows computer, follow steps in this Microsoft support article, noting that resetting the hosts file will affect software services that rely on hosts file redirects. If you're using Windows on a business computer, consult your IT department to be sure applications will still work correctly after resetting the hosts file.
- In the Finder, choose Applications > Utilities.
- Open Terminal.
- Enter this command and then press Return:
sudo nano /private/etc/hosts
- Enter the password you use to sign in to your computer and press Return. You won't see text appear in the Terminal window when you enter the password. Make sure you use a nonblank administrator password.
- Terminal will display the hosts file. Navigate using the arrow keys and look for an entry containing “gs.apple.com”.
- Add the # symbol and a space ("# ") to the beginning of the gs.apple.com entry.
- Press Control-O to save the file. Then, press Enter when prompted for the filename and Control-X to exit the editor.
- Restart your computer.
- 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, follow these steps.
- Follow this security-software troubleshooting article to correctly configure or temporarily uninstall security software.
- Bypass your Internet router. Some routers might block iTunes from accessing the update server. If you're using a router that is not manufactured by Apple, try these steps.
- Disconnect from your wired or wireless router.
- Use an Ethernet cable to connect directly to your modem.
- Restart your computer and modem. Contact your Internet service provider for instructions on using your modem.
- Be sure you have a working Internet connection by visiting www.apple.com. See this article for help or contact your Internet service provider.
- If your Intern et connection is working, try to update or restore your iOS device again.
Restore or update on another computer
Try restoring or updating on another computer with a working Internet connection. This will help rule out other issues on your computer that might be stopping iTunes from communicating with the update server.