Fix: iTunes was unable to load dataclass information error

Ken Ng

Father. Technologist. Photographer. Blogger. Shares his thoughts on the everything technology that amuses him on a anytime he can while regularly abuses his Mac, iPhone and iPad. Devices with APS-C CMOS sensors seems to be a favourite passtime and his job involves selling mules to connect stuff.

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17 Responses

  1. yeppp :) says:

    i had the same problem, but luckily this solution saved my day 🙂
    anyway itunes stores the data in Library, not in Application… this is why we got back everything as it was before 🙂

  2. Patrice says:

    Worked perfectly. Thank you!

  3. acs says:

    Thank you! This fixed the problem perfectly!

  4. pjb3 says:

    Just had to do this to fix iTunes after installing XCode 4 via App Store. Instructions worked.

  5. I just had this problem, too, when I tried to backup my iPhone. I found this page, and when I saw the connection to installing XCode 4, I knew I was on the right track. Anyway, the fix worked for me too. Very much appreciated!

  6. Tldelaney says:

    Awesome post. Thanks a lot!!!

  7. Works pretty well now. Thank you for this post!

  8. John L says:

    had the same prob. read these comments and tried the following short-cut: just moved Xcode to the trash and was then able to sync iTunes to iPhone again

  9. Anonymous says:

     had exact same problem.. just downloaded itunes from apple website and installed right over top.. did not thing else.. got rid of problem..

  10. Remarksman says:

    Same problem — so far I pretty much hate xCode 4!

  11. Philippe says:

    Thanks, you saved my life!

  12. Thank you that worked my syncing is fine again.

  13. Alan Duncan says:

    This same error occurs with iTunes 11.0.4 after installation of Xcode 5 DP3; but the fix does not work.

  14. Ken Ng says:

    Hmm. Let me look into this and see.

  1. April 3, 2011

    […] […]

  2. April 4, 2011

    […] […]

  3. May 12, 2011

    […] Lite Googlande gav mig den engelska versionen av samma felmeddelande ”iTunes was unable to load dataclass information error” och till slut även lösningen på problemet. […]

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