Skip navigation

iPhone sync error with latest iTunes

626 Views 2 Replies Latest reply: Nov 16, 2013 11:25 AM by Levoy Hurley RSS
Levoy Hurley Calculating status...
Currently Being Moderated
Nov 11, 2013 8:39 PM

My iPhone 5 has been doing just fine until I did the latest iTunes update a couple of days ago.  Now I get an error (-50) and it kicks out when I plug the iPhone in and it tries to sync.  A hard power off/on of the iPhone fixes the problem - until the next time I plug in for a sync. 

iPhone 5, iOS 7.0.3
  • norm123 Community Specialists Community Specialists (2,800 points)
    Currently Being Moderated
    Nov 14, 2013 2:10 PM (in response to Levoy Hurley)

    Hello Levoy


    Typically, error -50 is due to it connection to the computer via USB cable lightning or 30-pin cable or through other software on the computer. I have provided the steps to troubleshoot the issue further.


    iTunes: Specific update-and-restore error messages and advanced troubleshooting


    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 Dock Connector or Lightning Connector to USB 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. An incorrectly set default packet size can cause this error. Contact the software manufacturer that installed the packet-size modification for assistance. Or, follow this article by Microsoft to reset the packet size back to the default for Windows: How to reset Internet Protocol (TCP/IP).
    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.



    -Norm G.


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.