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

I was able to fix it. this problem happened with my wife's new iPhone 5s. My new 5s sync fine. Turns out it's because she set up her phone using her AppleID for everything on the iPhone, including iTunes and the App Store.

Fix:

- reset the phone to factory settings (erased all content)

- on initial startup, my wife entered her AppleID (which is different than mine and the one used for all our iTunes and App Store downloads)

- Go to Settings and click "iTunes & App Store" -- click the AppleID and click "Sign Out" in the window -- enter the AppleID username and password that is the same one you use for your iTunes account (and App Store)

- Go to Settings and click "Music" (just below iTunes & App Store" -- scroll to the bottom and click Apple ID under Home Sharing -- do the same as above to enter the Apple ID associated with the iTunes account on your computer -- this step is only necessary if you intend to use the Home SHaring feature.

- connect the iPhone to the computer and iTunes should sync

hope that helps.

John the man, saved my bacon!

Just back-up and restore your iphone.. it can helped you..

Hi Thanks everyone, this is driving me crazy!! I am going to try and restore it and then see what happens next....pray.....fingers crossed

No Way I tried all the solutions mentioned above but nothing worked for me , Please help me with this

I'm actually getting really aggrivated. I have tried every single thing in this thread to alleviate the problem and it still exists. I have an updated MacBook Pro and a new iPhone 5s. I have deauthorized and authorized my computer, reset my iphone, turned off and on, closed itunes and opened again, etc. Nothing works at all! Help..

Same here, NOTHING WORKS. I've tried every things except erasing my phone and starting from scratch which is NOT GOING TO HAPPEN.

Why doesn't anyone there DO SOMETHING? If Steve was still around this crap wouldn't be happening.

I never used any other login. ...except I am assuming the fact that I had to choose a new username because of iCloud didn't allow me to use my original login...which itself was annoying...why did I have to use a new email when the old one was FINE is beyond me.

I bought a new 5S and haven't been able to sync properly since I bought it, only Backup which doesn't seem to be syncing my pictures and probably other things.

This is an issue with the software that needs fixing by Apple.

did a different Apple ID come up at any point for you? It happened to me with a few apps and I was confused as to why since mine is a brand new 5s as well... I deleted those apps and redownoaded them but still no luck. I don't understand why it isn't syncing and why another ID popped up if it's supposedly new.

Hi,

I've been facing the same problem. Here is what I did in order to solve it:

The key to solve the problem is in the folder /Users/Shared/SC Info instead of deleting the entire folder as suggested in the link at the end of my posting. I had a look into it and found the following file lieing around .sid.lockFile with a modification date that was a couple of days old. Aparently it is a remonder of a recent crash of itunes.

1. quit iTunes
2. go to folder /Users/Shared/SC Info (folder is hidden!)
3. search for the file .sid.lockFile within the folder and delete the file (the file is hidden as well so be sure to turn on displaying of hidden files in finder)
4. restart itunes
5. synch with your iPhone / iPad etc.

PS: have a look into this as well:

http://support.apple.com/kb/TS1389?viewlocale=en_US&locale=en_US

climberCH This did not work. Resterted computer even, same problem. Went step by step from the Apple site.

Apple needs a real fix for this

I too am finding this very frustrating indeed, particularly as I only have three apps, and no music! Two are already on the iPhone, one purchased and one free. The third one is shown on the iPhone panel in iTunes as if it actually were on the phone - with the little box next to it saying "Remove", but is there any sign of it on the iPhone itself? No, there @@@**@@@ isn't.

It's quite true I am new to iPhones: the one I have was gift from someone upgrading to the latest model. But in every other way it seems to work fine.

I get the endless "this iPhone can't be synced" pop-up, telling me to authorise the computer. I do that and the ITunes Store tells me the computer is already authorised. Over and over again. About the only thing to be said for it is that I am unlikely ever to forget the password I'm using, I've typed it so often.

The phone and the account were originally in the UK and they are now in France, but the iTunes account is now properly set for France (it allowed me to buy and install the only paid-for app a week or so ago).

I'm trying to get the free version of Strava onto the iPhone and Mr Apple just won't let me. Perhaps he doesn't like cyclists?

Suggestions would be very welcome. I have already tried virtually all the ones in this thread, except doing the full re-set on the iPhone and re-installing everything. I don't want to lose the couple of apps that are actually there.

You have to be logged in with the Apple Id that was used by the person that purchased the gift content for you. Right under where it says to "authorize this computer" I where you can sign out and then sign back in with a different apple id.

Now getting the id of the person who origianlly purchased the content is another story

Thanks Badceed, and you may have helped me sort it. I was confused (in all these threads) by the word "purchased", as I hadn't quite worked out that free apps are treated by Apple as if they were purchased ones.

One other app was on the phone was the free version of the one I paid for - and that one had been put on the phone before I started using it. I have now deleted it and the phone seems to be prepared to sync with the subsequent apps and content.

I'll edit this later to confirm that it's working. I can't quite believe it yet...... I spent three or four hours last night cursing Apple and all his works while I tried to sort it out.

Thanks again!

I switched to wifi, didn't connect the cable and hit SYNC. For some reason I didn't get the warning window, thought it worked... but my photo's didn't actually sync even though it looked like it worked

I then connected the cable and re synced via cable and got the warning again.

😟

Deleting the rogue app that I didn't "buy" myself seems to have improved things, but I still get endlessly urged to authorise a computer which Apple then tells me is already authorised.

However, the apps do seem to be syncing now, even though the pop-up box says they aren't, and I am able to transfer content, so perhaps things are looking up. As I don't yet know what should work and how, it may be a while before I spot what isn't right. And maybe someone will find a proper solution.