this worked for me when I got the same error trying to sync tv shows from iTunes to my ipod touch:
I went into my Harddrive -> Music -> TV shows and renamed all .m4v files to .mp4 files -> synced again and then they were all there. Worked like a charm.
The original post I found said to do this:
1. Remove the digital content from iTunes (but keep the files) -->> I didn't remove anything though, I just renamed them and then they synced the next time
2. Rename all .m4v files to .mp4 files
3. Add the files back to iTunes
Same Problem here...
New installation of windows7 32bit, new Installation of iTunes newest version....
iTunes sign in with my appleid firstname.lastname@example.org > computer activated
Downloaded all purchased apps to pc.
Connected my iPhone to iTunes , sync app, computer need to be activated....
Same apps on iPhone as on pc, all solution suggested here and found trough google not working ....
Does anybody can help me please ?
I have had this problem and I'm not sure if it's exactly the same but Apple needs to fix it because it's extremely annoying and very difficult to solve.
Here is the message I got today when trying to synch my iPhone:
"The app "Mines Free" was not installed on the iPhone <my Device Name> becasue you are not authorized for it on this computer. To authorize this computer for items purchased from the iTunes store, choose Store > Authorize This Computer."
Well, guess what... this has NOTHING to do with the authorization of my computer or phone device. It's simply that the app with this name is no longer on the iTunes store. I guess the developer of the game must have deleted it or renamed it or something.
This has happened to me before with another app, and I even called Apple and nobody could help me. I figured it out myself.
Apple, please change this message to "This app is no longer in iTunes" or something similar, so we all don't think our devices and computers have authorization problems!!!!
I have a probem after i change it.After I double click on the app icon, it shows a user name and password, I change that to mine. But, when I do this, it says right after "This computer is already authorized" and when i click on the same app, the user changes back to the other one which is not mine.. Can someone please help mee???
So I just fixed my problem - unfortunately it requires the old Apple ID you used to make all the purchases...
When I plugged my iPhone 5 for the first time into my new Macbook Pro (running on OS X 10.8.2), i was asked to authorize. I used my new Apple ID, i decided I needed my own apple id because my familys phones were all tied together under our old ID and we were all losing our contacts and information.
It authorized under my new one. Then my phone actually began syncing, and I was told that "This computer is no longer authorized for apps that are installed on the iPhone..." then something prompted me to sync again.
In that form I used the old ID i used to buy my music and apps. I had to deauthorize my old laptop because you can only authorize 5 computers with the same ID.
Now my phone is syncing!
Same problem..but here is what I did which worked for me.
In this ORDER
- Disconnect iPhone
- Deauthorized computer in iTunes.
- Signed out of App Store
- Signed out of iTunes
- Quit iTunes
- Delete your iTunes preference file (User/Libarary/Preferences/com.apple.iTunes.plist)
- Open iTunes
- Connect iPhone
- Do a backup of iPhone to your Hard drive (this maybe not necessary but for what I needed I did it)
No problems after that about asking me to authorize apps.
Also. I've decided to just purchase apps on my phone only sync back to the computer. So I can basically stay logged out of itunes since I never buy any content from them anyway except apps. I just don't think Apple has done enough to stop these glitchy problems. I never know what is syncing now with what and in what direction.
NOTE: do not assume any cloud sync is a backup..it's only syncing to a cloud. If something goes wrong..it goes wrong everywhere instantaneously. There is no place in the cloud to ask.."please restore my addresses, notes or apps from this particular date". A REAL backup is that....a backup on another drive somewhere else out of Apple's hands.
I tried his solution :
I might add that i had to remove the app from my iOs device and from my computer. Then i redownloaded the apps on my computer, synced to my iOs device.
Finally i had to authorize once again my computer, and it worked.
But it's a very painful process.