iTunes cannot sync... apps installed on the iPhone could not be determined.

Ihave an iPod Touch 3rd gen. I went to info on iTunes and unchecked everything. To sync the calendar I only checked calendar and under advanced tab I checked calendars. Then clcik apply. Then I clicked sync. Then it went through the syncing process. I've not yet verified this works for every category.

I have a problem with my itunes too. I cannot transfer apps from the itunes to my iphone 4s. Any time I try to snyc itunes tells me "The iphone could not be synced because this computer is no longer authorized for purchased items that are on this iphone. But I keep authorzing it but the same problem over and over again... Please someone help

I had the same issue with iTunes not synching anything because of the above error.

After turning phone off, restarting PC and so forth I found that because my phone would "auto lock" it was preventing iTunes from completing the synchronisation.

So, I sync'd my phone via iTunes and then just sat using it whilst the sync completed... No errors appeared and it was okay.

Therefore if you're having this problem - don't let you phone go into lock mode and see if works fo ryou too!

This also seemed to work for me, I also restarted my iPhone. Thanks for the tip, though. Now it has happened about 4 times since the update, but it has been buggy since the update to iOS7. Not a lot, but still irritating.

I'm not surprise that I have this problem today, and that's a 2 years old bug.

Even the crappier androphone that you can find don't have tons of sync bug existing for years !!!

You should be ashamed. You should be so ashamed that 150 billions should not make you happy but you should be so ashemed that the 150 billions can't make you stop crying.

PS Don't forget that if you ignore people and bugs, people could also ignore you and your products.

dann- Thanks! Your solution worked for me. Once I chose "transfer purchases from "____'s iPhone, I received an alert listing a group of apps that could not be synced. I deleted a few of the apps (The Bible, The Washington Post, Target, and Yelp ... just to name a few), and then the sync worked. Whoo-hoo! I was at this for hours! Good luck guys.

What worked for me was I went to the app store, updated all my apps, then restarted my iphone (5s) while it was still connected to the computer. Once I pressed the sync button again IT WORKED 🙂

Sign into your Apple ID on the device. That seemed to do it for me. I was syncing through iTunes, not directly downloading to the device. Once I signed in, it started to sync.

Great. Thanks people. I went to the App Store app and selected all apps in the Update tab. I then clicked on Transfer Purchases on the computer and when it had transferred all the purchases from the phone to the computer I then clicked synced and it all worked fine.

your solution is cr@p too 🙂

coz it doesnt work either.

I tried a different cable after multiple failures to complete the sync & "Lo & behold!" it worked seamlessly. Many thanks.

Thanks! This worked for me- only 2 starts, and I was golden- Thanks!!

I've just had a similar issue with my iPhone 5S. Updating all apps in iTunes before starting the sync did the job.

I tried lots of the suggestions here, but none worked for me until I tried:

1) Connect iPhone with cable to computer.

2) Select iPhone on left menu.

3) Select "Apps" across the top menu.

4) Search box at top of the list on left for the app name that wasn't sync'ing.

5) When the app showed up from the search, click "Install"

I have no idea why it wouldn't sync otherwise until I did this...but it worked for me.

Hope that helps.

Hi guys,

im having the same issue as well since after i updated my 4s to ios 8. My lappie's itunes shows error when i try to sync apps from itunes. It pop up error which quite ridiculous, it said my itunes is not authorised, well actually it's been authorised by my apple id since the day i use iphone.

anyone have any solution on this? Your help is much appreciated.

Thanks.