IOS update 9.3 via iTunes MAC OS X 10.10.5 gives unkown error code (error -50)

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Hunter.Peck Author

Level 1

30 points

IOS update 9.3 via iTunes MAC OS X 10.10.5 gives unkown error code (error -50)

Anyone seen this error?

iPhone 5s, iOS 9.2.1

Posted on Mar 28, 2016 4:03 PM

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Answer 1

Mar 28, 2016 8:25 PM in response to Hunter.Peck

The help document that brought you here used to also include:

Error 13, 14, 35 and 50 (or -50)

These errors are typically resolved by performing one or more of the steps listed below:

1. Perform USB isolation troubleshooting, including trying a different USB port directly on the computer. See the advanced steps below for USB troubleshooting.

2. Put a USB 2.0 hub between the device and the computer.

3. Try a different USB 30-pin dock-connector cable.

4. Eliminate third-party security software conflicts.

5. There may be third-party software installed that modifies your default packet size in Windows by inserting one or more TcpWindowSize entries into your registry. Your default packet size being set incorrectly can cause this error. Contact the manufacturer of the software that installed the packet-size modification for assistance. Or, follow this article by Microsoft: How to reset Internet Protocol (TCP/IP) to reset the packet size back to the default for Windows.

6. Connect your computer directly to your Internet source, bypassing any routers, hubs, or switches. You may need to restart your computer and modem to get online.

7. Try to restore from another known-good computer and network.

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Answer 2

Hunter.Peck Author

Level 1

30 points

Mar 28, 2016 8:28 PM in response to Limnos

Thank you Limnos, I could not see 50 code when I scanned the lists.

The final fix was powering down the iPhone 5s, I disconnected the phone from the laptop and did the update directly to the phone.

An identical iPhone 5s updated without a hitch. the baulky iPhone suggested I did not have a network connection.

The reboot appears to have cleared the fault.

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