the iPhone could not be synced because this computer is no longer authorised for purchased items that are on this iPhone

This is how I fixed this problem. I could not sync my iPad. When the problem began a couple of days ago, I got this alert message. After many attempts to fix it, following the suggestions here, the sync was simply cancelled with no reason given as reported in the thread shown here <Itunes keeps cancelling sync ???>.

None of the suggestions given in that thread solved the problem, either.

I finally followed the suggestion to restore my iPad. I connected to iTunes and did a restore to factory settings and then restored the iPad data from my backup, which is on my computer. I was then able to run sync without any issue.

I had the exact same problem. It looks like some things work for some and other things work for others.

After hours/days/weeks with this problem, this is what ultimately worked for me.

Forgive me (experts) if I am dumbing this all down for people... but I could have used the "dumbed down version" a while ago. Hope this helps someone.

My Solution:

You have to authorize the computer with EVERY apple ID that is used on any of the devices that are being synced.

So for instance, if you have an apple ID that is used for mainly for the phone but then use an alternate apple ID for family share purchases, then you need to authorize the computer (while in the computer's iTunes app) for BOTH AppleIDs.

How you do this?

1. Log into your iTunes app on your computer.
2. Go to the menu bar.
3. Select Store.
4. Select Authorize this computer.
5. Plug in the apple ID that is associated with purchase for the iTunes account.
6. Then, do this exact same thing for any other the apple ID tassociated with your device. (To avoid accidental charges in iTunes, I just left he billing info blank on my alternate ID set up, so that nothing could be charged).

I have absolutely no idea why you need to do this, but it is what resolved this problem. Nothing else helped. But this did the trick for me.

I'll go try this. Haven't been able to get past this computer not authorized message since I adopted my wife's iPhone 5S when she got her new 6S

for Christmas. I used to have a 4S. Same PC computer nothing else changed. Grrr.

This did the trick. What an easy fix. I just unselected a ringtone and then "apply" popped up as an option. I hit apply and it allowed me to finish the sync.

I tried many different solutions but yours is the one that finally worked. It was a very simple fix. All I did was change one of the ringtones and then the word apply appeared as an option. I then click the word apply and it allowed me to get can you do the entire sink process. Thanks!

This works as you said !! Thanks !!!!! That was getting old fast....

This was helpful thank you. Apple at one point was elegant and intuitive, they really do seem to have lost their way.

This was exactly what I did to fix the issue.

I signed out of my main iTunes account and signed into the alternative one which has been used to download some apps, authorised this computer, and I could then sync.

Since signed out of the alternative and back into main, haven't tested syncing again, but expect it will work now as this computer is now authorised on the alternative account.

None of the solutions that people have talked about have worked for me. All 3 accounts that have games/apps on my phone are authorized on my computer. I have since deleted the apps/games that are not from MY main account and de-authorized the account then authorized it again and it is still doing it.

I have tried every idea without success but after deleting two apps from my iphone which I bought with different apple ID in the american store everything went OK (my default store is the hungarian store).

This was the most helpful comment of all, for me. I did exactly this and solved the issue.

Thanks heaps!

AndyMac1575 wrote:

This was the most helpful comment of all, for me. I did exactly this and solved the issue.

Thanks heaps!

Which comment?

Delete every app which isn't signed in as the iTunes that you're using. Then sync/ apply. That should work.