Forum Question: iPhone/iPad cannot be synced – unknown error (-27)

Hi Gary,

Keep up the great work on the awesome podcasts!

I have been experiencing an intermittent error with my iPhone and now occasionally with my new iPad that reads “iPhone cannot be synced. An unknown error occurred (-27).”

If I hit sync again it works ok and when I get the error it seems to be near the end of the sync process.

Any suggestions? Thanks!

— Steve

Comments: 6 Responses to “iPhone/iPad cannot be synced – unknown error (-27)”

    5/22/10 @ 7:19 pm

    I’ve never even heard of an error -27. That’s odd. Can you visit an Apple Store and ask? I’d love to know what they say.

      5/24/10 @ 2:26 pm

      So far Apple’s suggestion (I called Apple Care) was to try different USB ports to see if the problem still exists. I have had the error when I was plugged into a powered Belkin USB hub as well as when I have been plugged directly into my 17″ MacBook Pro.
      I’ll experiment with different ports and see what happens.

    David Holmes
    5/26/10 @ 10:50 am

    My problem is a little different. I have a first gen IPhone. Sync’s with Outlook (2003) fine until about a month ago. I have tried everything including a complete uninstall and re-install if ITunes. I even “restored” my IPhone. Still no sync with Outlook calendar or contacts. Did a web search and followed every tip I could find. Nothing works. I used to “see” a “calendar” in ITunes so you could check the box to sync a “separate calendar” but no separate calendar appears.

    Any ideas?

    6/6/10 @ 8:03 am

    My -27 error problem seems to only happen if I have the device selected in the iTunes sidebar. I need to continue to test this to make sure it is not just a coincidence, but it seems like if I have anything else selected in the sidebar I do not get the error. Seems kind of strange.

    6/10/10 @ 2:44 pm

    My last post was not correct – I still was getting the error until I think I figured it out. I was not getting the error anymore on my iPad and the only difference was that I had the iPhoto option to include videos checked on the iPhone but not on the iPad. When I had it checked on the iPad, I got an error message saying that some of the videos were incompatible (I’m assuming from my Kodak digital camera). Since I have unchecked the option to include videos in the iPhoto sync with the iPhone I have not received the error. I hope this really fixed it this time.

    7/24/10 @ 4:42 pm

    After i jailed break my ipad, it can not sync with video on my mac. I tried to restore it and worked fine. Again after re jailbreak my ipad it can not sync video. All other function are fine. Anybody can help ?

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