ITunes Sign In To Use This Computer / iTunes crashes / iTunes restarts

I have been having this problem on and off for a very long time now, through at least one major update of the iTunes software. I recently purchased an album from the iTunes store and the problem has returned. I've searched the forums for advice and got a lot of very weird advice. None of it helped.
The problem is: when I start my MacBook Pro (12 months old, all OS patches installed 10.7.3), iTunes 10.6 starts then request that I "Sign In To Use This Computer for Automatic Downloads." iTunes does not recognize my password; displays a slightly different dialog screen that says "Sign In Required," then back to "Sign In To Use This Computer for Automatic Downloads," which repeats and repeats then switches to the other dialog "Sign In Required," then back to "Sign In To Use This Computer for Automatic Downloads," et cetera. If you cancel out, which it accepts after hitting cancel three times, then navigate to the iTunes Store, the iTunes Store starts to load, then iTunes crashes, asks you if you want to send a report to Apple (I've personally sent at least a 100 of these already), then iTunes restarts. You can't kill it - if you force quit, it restarts immediately.
Any suggestions other than Authorizing / Deauthorizing / Deleting the SC Info Folder?

I have this same problem iMac Lion 10.7.3, iTunes 10.6.1(7). Any ideas what I can do to stop it?

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ITunes is repeatedly asking me to 'Sign In To Use This Computer for Automatic Downloads'. How do I fix this?

I am running OS X Yosemite 10.10.1 and using iTunes v. 12.0.1.26. Whenever I open iTunes after initially asking for my password ('Sign-in Required'), it repeatedly asks me to 'Sign In To Use This Computer for Automatic Downloads'. No matter how many times I enter the correct password it keeps popping up until I hit cancel at least 4 times. Additionally, now when I attempt to make a purchase in the iTunes store it does the same thing preventing me from purchasing anything. It repeats the 'Sign In to the iTunes Store' log-in prompt and no matter how many times I enter my CORRECT password it will not accept it. Why is iTunes doing this and how can I fix it?

I have this same problem and it drives me crazy. I've posted a topic about this, with no replies. In my case I'm pretty sure it's because in iTunes Preferences/Store/Automatic Downloads, I have Music-Apps-Books checked.
But this is what happens to me everytime I open iTunes:
Automatic Downloads password window pops up / I put in password
Immediately again, password window pops up / I put in password
Now I'm fine until I close iTunes and open again
If I don't feel like putting my password in two times and cancel, if you cancel the window 3 times, it goes away.
What I don't understand:
Why isn't the Automatic Downloads password stored in Keychain
Why does it ask for the password two times

Can you stop the 'Sign in to use this computer for automatic downloads' window appearing at iTunes launch?

Whenever I start iTunes, two windows appear, one after the other, asking me to sign in to use the computer for automatic downloads. Even if I cancel both windows and don't sign in, automatic downloads are still enabled, as they are if I sign in on one or two of the popups. So, to the point, is there any way of disabling these windows at the start-up of iTunes? - they're useless and slow me down xD.
Incase you need it, I'm running a Lenovo G570 laptop on Windows 7 64-bit @ 3.10Ghz with 6GB RAM.
Thanks in advance!

I'm seeing the same issue as well with the most current update of iTunes (10.5.3).
What makes this even more of an issue is whenever I have to do this, iTunes Match starts syncing, but never completes, so the only way for me to see my iCloud synced music is to turn off iTunes Match, turn it back on, re-log in again, then it finally shows up about 30 seconds or so later. With each quit and re-launch of iTunes, I have to go through this whole process again to get my synced music to show.

HT204406 Hi! i purchased itunes match a while ago and everything was going fine until i found out that my girlfriend had signed intp her itunes on my mac account. now when i try to turn itunes match on it says This computer is already associated with an A

anyone any ideas?

I'm having the exact same problem and I am the only person who has ever been logged on to this computer to use iTunes Match. Only my wife also uses this computer, and she has never used or signed up for Match.
Interestingly, I have the same number of days listed on my error, 82 days.
Obviously, Apple has screwed up somewhere. I've put a help request in. If we cannot find a solution, we'll have to let everybody know that Match is a ripoff and that all should avoid this fraud like the plague...
Shalom, y'all!
L. Bangs

Recently wiped out my mac do to mavericks update going wrong. If i add this computer with my itunes match will it put all the music i had back in my itunes library or just upload the little bit of music i purchased on itunes in the past?

Recently erased my entire mac HD do to mavericks update going wrong. I do not have a back up for my music. But my itunes match account has all my music. If i add this computer with my itunes match will it put all the music i had back in my itunes library or just upload the little bit of music i purchased on itunes in the past that im only seeing now in my itunes? I do not want itunes match to sync or upload the little bit of purchased music i have on my itunes now..Please Help Thanks..

Hello gogreenj14,
If you had iTunes Match updated with all of your non iTunes purchased content already, then yes, when you enable iTunes Match with the following article it will have all the content that has been uploaded to iTunes Match will be available for download.
iTunes: How to add a computer or iOS device to iTunes Match
http://support.apple.com/kb/ht4913
Open the latest version of iTunes on the computer you intend to add. You can download the latest version of iTunes here.
Sign in with the Apple ID you use with iTunes Match.
Choose Store > Turn On iTunes Match.
Click the Add This Computer button.
When prompted, enter your Apple ID password.
iTunes will automatically begin scanning your computer's library for matches.
A status indicator will allow you to track progress. You may also manually pause and resume the process at any time by clicking the Stop or Start button.
Once iTunes has completed matching and uploading your iTunes library, your music in iCloud will be integrated into your local music library. A download button will appear to the right of any content that you have in iCloud that doesn't already exist on your computer.
Thank you for using Apple Support Communities.
Cheers,
Sterling

HT1420 I can't find the "authorize this computer" on the itunes store

I can't find the "authorize this computer" on the itunes store

Authorization and Deauthorization
Macs: iTunes Store- About authorization and deauthorization.
Windows: How to Authorize or Deauthorize iTunes | PCWorld.
In iTunes you use the Authorize This Computer or De-authorize This Computer option under the Store menu in iTunes' menubar. For Windows use the ALT-S keys to access it. Or turn on Windows 7 and 8 iTunes menus: iTunes- Turning on iTunes menus in Windows 8 and 7.
More On De-authorizing Computers (contributed by user John Galt)
You can de-authorize individual computers, but only by using those computers. The only other option is to "de-authorize all" from your iTunes account.
1. Open iTunes on a computer
2. From the Store menu, select "View my Account..."
3. Sign in with your Apple ID and password.
4. Under "Computer Authorizations" select "De-authorize All".
5. Authorize each computer you still have, as you may require.
You may only do this once per year.
After you "de-authorize all" your authorized computers, re-authorize each one as required.
If you have de-authorized all computers and need to do it again, but your year has not elapsed, then contact: Apple - Support - iTunes - Contact Us.

TS1389 I am trying to authorise a new computer. The Apple instructions are to select Authorise this computer from the itunes store menu. I can't find this in any menu. Can you please help? How do I authorise my computer?

I am trying to authorise a new computer. Apple's instructions are to select "Authorise this computer" from the itunes store menu. I can't find this in any menu. Can you please help? How do I authorise my computer?

Authorization and Deauthorization
Macs: iTunes Store- About authorization and deauthorization.
Windows: How to Authorize or Deauthorize iTunes | PCWorld.
In iTunes you use the Authorize This Computer or De-authorize This Computer option under the Store menu in iTunes' menubar. For Windows use the ALT-S keys to access it. Or turn on Windows 7 and 8 iTunes menus: iTunes- Turning on iTunes menus in Windows 8 and 7.
More On De-authorizing Computers (contributed by user John Galt)
You can de-authorize individual computers, but only by using those computers. The only other option is to "de-authorize all" from your iTunes account.
1. Open iTunes on a computer
2. From the Store menu, select "View my Account..."
3. Sign in with your Apple ID and password.
4. Under "Computer Authorizations" select "De-authorize All".
5. Authorize each computer you still have, as you may require.
You may only do this once per year.
After you "de-authorize all" your authorized computers, re-authorize each one as required.
If you have de-authorized all computers and need to do it again, but your year has not elapsed, then contact: Apple - Support - iTunes - Contact Us.

"Sign in to use this application on this computer"

When I copy an App Store application (or an update) from my first Mac to one of my other Mac's Application folder and try to run it, I get the dialog box:
"Sign in to use this application on this computer - was purchased using App Store on another computer. To install “xxx.app” on this computer, sign in using the Apple ID and password used to purchase it."
Often, after entering my Apple ID/Password, this works, but with some applications it doesn't at all! In these cases the dialog box stays and I get the message "Connection failed" in red, but that's not the real reason I suppose. When I repeat entering Apple ID/Password, often the dialog disappears, but I still can't use the app.
What can I do?

When I copy an App Store application (or an update) from my first Mac to one of my other Mac's Application folder and try to run it
Better to re download the app directly on the Macs, instead of trying to copy an app.
Downloading past purchases from the App Store, iBookstore, and iTunes Store

If i subscribe to itunes match can I use this to transfer my music to a new laptop

if i subscribe to itunes match can I use this to transfer my music to a new laptop

Don't.
1) Match would be horribly slow unless you have a tiny library.
2) Match won't transfer all file formats. I am pretty sure it is just music.
3) Match may degrade your music quality if you use high quality file formats.
Why not simply copy the whole iTunes folder to the other computer using an external drive, then start iTunes on the other computer while holding down the option/alt key and select the copied folder? This will copy the entire library intact.

Itunes cannot be installed on this computer because it requires mac os x

I just got the iphone 3g and dug out my eMac to use for the syncing. I pulled it out and downloaded the .mpkg file and put it on a thumbdrive (I have no internet at my house) and I tried to install it on the eMac and got this error --- "itunes cannot be installed on this computer because it requires mac os x 10.3.9 or higher" but I only have 10.2.8... Why does it matter what OSX I have? It's new software but who cares??
What should I do? I dont have to get the next OSX do i?!

Why does it matter what OSX I have?
Newer iTunes versions require specific components in Mac OS X to operate correctly.
What should I do? I dont have to get the next OSX do i?!
You need to purchase and install Mac OS X 10.4 or 10.5.
(33528)

HT1420 I can't find the "authorized this computer" on the iTunes store menu. Can anyone tell me where to look for it? It doesn't seem to be in the topics across the top of the home page. Thanks.

I am trying to authorize a computer. But I can't locate the"authorized this computer" on the iTunes store menu. I can't find it under any topics across the menu bar at the top of the page. Can anyone help me find it? Thanks.

It should be on the Store drop-down menu at the top of iTunes (if you are using iTunes 11 on a PC then try pressing Alt-S and see if it appears) e.g. (screenshot is from iTunes on a Mac)

We have 6 ipods and 1 iphone in our house. We have different itunes accounts. We use one computer. How can we share each others music? I moved everybodies itunes media folder to the public folder but when I open itunes I only see that accounts music.

We have 6 ipods and 1 iphone in our house. We have different itunes accounts. We use one computer. How can we share each others music? I moved everybodies itunes media folder to the public music folder but when I open itunes I only see that accounts music. We need different itunes accounts. We share 1 computer but we have different user accounts on the computer.

Adding media directly to the media folder does not make it appear in the library. iTunes doesn't really 'look' at that folder except to go to specific files when you call upon them from a library. You have to drag new content to each user's library, that is assuming each user has their own library.

Mac g5 Alert Itunes cannot be installed on this computer?

I just got a iphone 5, and wanted to sync my backup from my computer MAC G5, needed to install Itunes latest version but got this message?
Alert Itunes cannot be installed on this computer?

OS X 10.6 is not going to doWillFeild much good seeing as how he has a PowerPC Mac that is not capable of running it.
The only way he can get the iTunes he needs is with a new Intel Mac.
Allan

When I click the download apps,itunes ask me to authorise this computer and I finish do it, it ask me authorize again and again

when I click the download apps,itunes ask me to authorise this computer and I finish do it, it ask me authorize again and again

Delete the song from your Itunes music list, then redownload it, Itunes will ask you if you if you want to download it for free. This seems to be the fix for my problems.

After installing 10 .5.1 and buying itunes match I click add this computer and I get a window saying itunes has stopped working and itunes closes

after installing 10 .5.1 and buying itunes match I click add this computer and I get a window saying itunes has stopped working and itunes closes

I found that after I turned on geniuseverything worked

ITunes Sign In To Use This Computer / iTunes crashes / iTunes restarts

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