items could not be synced. See Itunes for more information

I had the same message saying 191 items could not be synced but iTunes said nothing about a sync problem. So I tried resetting the sync history and the warning didn't appear again the next time I synced.

Go to Edit, Preferences, Devices and click Reset Sync History.

Hopefully this fixed the problem for good.

I'm having the same problem with "3 items could not be synced. See itunes for more information."

I'm also looking for logs, which I've read don't exist. It appears that iOS 5 and iTunes 10.5 bring major changes to how sync is handled on the Mac (no more iSync). I tracked down the source of these problems, but not a solution.

In iTunes, click the triagle next to your device. Click Music and scroll through the list. I see one greyed out song with a sync circle next to it. That song appears on at least two playlists. Do the same in Movies, TV Shows, etc. Unfortunately I don't think there's a way to check the photos this way.

Once you do this you can try unsyncing that content, maybe.

I also have 7 songs not on any playlist with dark "!" circle next to them. They aren't on any playlistand seem to be "stuck" in sync.

I struggled with this for an hour, re-downloading items from iCloud/Store and transferring to iTunes (Mac). Finally, I synced my old iPhone to check whether the same problem existed. It did not--no errors. So I synced my new device again and -- voila! All sync issues are gone.

Apparently there was some issue between the old device and new device syncing. I backed up old iPhone and restored to a 4S. I recommend checking other devices and syncing them, then resync the one with problems.

Ok, the old iPhone sync did NOT fix this. But this seems to have worked: I Reset All Settings on iPhone. Then I restored from a backup made earlier today and now I've sync'd twice without problem returnning.

The Backup I used was made while I was having the song sync problems, so the problems don't seem to be backed up, but rather part of internal data.

If I go to edit when I am in iTunes, it doesnt show "preferences". The "preferences" it shows it when I go to "Itunes" on the top left. Then I can go to "devices" and only delete the "device backups". Is that the same thing as you explained?

I finally got it to work... After days of getting "25 items could not be synced. see itunes for more information." I right clicked my device (iPhone 4S) in iTunes, and "Reset Warnings" and then immediately synced again. The warning then popped up listing the issue files. For me, they ended up being movies which were a format that I couldn't play on the device. I went to the movies tab and unchecked those 25 files, and bingo! No more issues. Of course to uncheck them, you have to have the box checked for "Sync only checked songs and videos" on the summary page for the device also... Hope this helps!

I finally got it to work... After days of getting "25 items could not be synced. see itunes for more information." I right clicked my device (iPhone 4S) in iTunes, and "Reset Warnings" and then immediately synced again. The warning then popped up listing the issue files. For me, they ended up being movies which were a format that I couldn't play on the device. I went to the movies tab and unchecked those 25 files, and bingo! No more issues. Of course to uncheck them, you have to have the box checked for "Sync only checked songs and videos" on the summary page for the device also... Hope this helps!

Okay this boggled me for days but this is a phone issue, my phone would not complete sync and when I canceled the sync it would tell me I had "6 items that could not be synced. See iTunes for more information". Couldn't really find anything to help on iTunes. I ended up on my iPhone 4 going to settings-general-reset-reset all settings. This immediately fixed all my problems. I hope this works as well for everybody else as it did me. 🙂

This just cleared the same message (3 Items...) from my iPad. Thanks.

I also had this problem. It seems like there are as many causes as there are solutions. For me, it meant my Iphone had hit capacity (there was no more room to add songs). so I just deleted some video to make space and everything worked fine.

Photos may cause this problem. When you sync photos to your iPhone, iPad, or iPod; iTunes creates a small version of each photo and stores them in a folder called “iPod Photo Cache.” Sometimes, inconsistencies between the real photos and photos in the cache folder may result in this error. To fix this error, simply remove the iPod Photo Cache folder(s).

Don’t worry, this folder will be recreated automatically the next time you sync photos and removing this folder will not erase your original photos. Here is how you can locate the iPod Photo Cache folder so you can drag it to your Trash (on a Mac) or Recycle Bin (on a PC). Follow: Go > Home, then open the Pictures folder and find the iPhoto Library file. Control-click the iPhoto Library and choose Show Package Contents where you can locate the iPod Photo Cache folder and drag it to the Trash. Then restart iTunes to re-initiate your sync.

from "http://appletoolbox.com/2011/12/items-could-not-be-synced-see-itunes-for-more-in formation-error-fix/"

Hey! I fixed mine with an unbelievably simply solution.

I noticed I only had like .04 GB of storage capacity left, so I removed a movie, which takes up alot of space, and the apps that were "waiting" automatically finished downloading.

And I don't know anything, usually! Hope this helps somebody else.

I finally see the list of unsynced items. I have iMAC running 10.8.4 and itunes 11.0.4

When I reset the warning in itunes, the error came back to my ipad (12 things not synced). I went back to itunes where I just synced, in the itunes device tab, there was an alert symbol next to the name of device (top left corner), (not to be confused with the undock button). When I click the alert, I can see a number items not synced, expanded the list and in my case I see thay are all movies not compatible with iPAD.

Finally, only took me 6 months to figure this out! I preferred when the window came up on its own.