IPhone/iTunes sync hangs during "backup" phase

When I plug my iPhone into my Mac, a sync with iTunes starts. That's fine; what's not fine is that the synchronization always "hangs" during the "Backing up your iPhone" phase. If I click the little "X" on the iTunes display window, it proceeds fine, presumably skipping the backup phase of the sync.
How can I stop this from hanging during the synchronization?
Thanks.

I have been experiencing this problem lately as well. I've been using an Iphone for over a year now and this is a NEW problem in the last 30-45 days.
My Iphone takes over an hour and a half to complete the backup. It appears to be hung but is not.
I also just got off the phone with Apple Tech Support....yeah...that was a waste of time. Essentially, they told me that ALL the data on your iphone goes through the Itunes server across your active internet connection and the time can vary depending upon how busy the server is and how much data is on your Iphone.
Holly Crap!....who designed the architecture for this thing. I don't know about the rest of you, but I find this completely unacceptable. If this continues beyond September, I am switching to a Blackberry. When I connect my Iphone I don't expect to retire before the freakin thing finishes.

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ITunes sometimes freezes during backup phase of syncing

Usually every day or two when I plug my iPhone in to my Mac to Sync (ios 4.1, iTunes 10) it hangs during the backup phase - even if I leave it for hours. I then disconnect the iphone and shut it down but it hangs when it shuts down (just a spinning wheel). I then force restart it and then it syncs with iTunes and but at the end says it was unable to back it up. I then unplug it and plug it back it and then it syncs and backs up fine again. As I said this doesn't happen everytime I sync my phone but usually once in 4-6 syncs. Any ideas on what might be going on here? It has also happened to me once or twice on my iPad so am wondering if it might be an issue on the iTunes side.

This is exactly what's been happening to my iPad for the last month or two. Backups used to be very, very slow before I installed iOS 4.2 but now I have the same problem with a complete backup hang every 5 or so syncs.
I spoke to someone at the Genius Bar when I was there for another reason the other day and he said it was likely to be something to do with photo syncing but I wasn't clear exactly what aspect of photo syncing was causing the problem. Anyone got any ideas?

ITunes sync 'hangs' during 'importing photos'

iPhone 4, latest iOS version and latest iTunes version ...
During syncing, the process gets to 'importing photos' and then never finishes. I have to manually cancel the sync to use the phone again. How do I fix this? Thanks.

Sorry RamsayX, but how do you do that? You turned it off in iPhoto or iTunes? The latter I can't find. That's where it hangs for me. I need to sync my phone once in a while.
Ray, do you know what app it hangs on? Not sure if it displays this. Have you opened all your apps on your phone recently? The one that gives you a potential problem, delete it, and reinstall it from iTunes.
Other than that, I have no clue how to force this out. Not like it was dealt with in the last update.
Cheers

ITunes sync hangs on Calendars

There are so many threads and discussions on this and similar that i decided to try and start fresh and provide users out there with a detailed description of my issues and how I finally resolved it. Some of my paths to resolution may have been unnecessary.
I suspect if I had simply upgraded my iPhones IOS from the get go I MOST likely would have fixed the issue then and there!!!
Suggest you read this first - then make your own call!!
Systems:
Mac Air:
- Mountain Lion v10.8.2
- MS Outlook for Mac 2011 v14.2.4 (using IMAP for several gmail a/c's and others)
- iTunes v10.7
- iCal v6.0 (1645)
N.B.: before upgrading to Outlook 2011 I experienced many bad experiences with corrupt Entourage d'bases. Net result was I set up Mac Mail to run as a background process (same IMAP connections etc) - this paranoid approach continued even after upgrading to Outlook 2011. Result - complete confidence that I have a full set of all my mail history should MS die an ugly death again!!!
iPhone 3GS
- previously running IOS v5.??
- now running IOS v6!! more on that later!!
History:
After a recent OSX upgrade and a MS update (both coincided within a few days if i recall correctly) when syncing my iPhone (running IOS v5.??) iTunes sync started to hang at Step 3: calendars.
I followed all manner of suggestions from this community and others to no avail.
So this is what I did:
Ensured Mac Mail was complete and up to date as well as backed up to Time Machine AND I generated archive copies just in case!!!
Followed the steps to completely remove MS Office.
Reinstalled MS Office from scratch.
{side note: got to last stage of install and had a really hard time completing because syncservicesagent would not die!!!! This support article resolved that and enabled me to move on ...
http://support.apple.com/kb/TS1627
"In the Terminal window, type or paste the following command on a single line:
/System/Library/Frameworks/SyncServices.framework/Versions/A/Resources/resetsync.pl full
... close side note}
Here I made an error. I set up Outlook again whereas I should have thoroughly tested iPhone syncing via iTunes to iCal without Outlook in the mix.
Reset mail and calendar settings in Outlook - got it syncing with iCal again.
Plugged in iPhone - iTunes sync still hangs!!!!!!
Kick some stuff - generally vent some annoyance.
Hit iPhone software restore in iTunes and go through the process of restoring the iPhone which actually upgrades you to IOS v6 (which I wasn't ready to do but so far so good).
iTunes sync no longer hangs!!
Tested all permutations of meetings ...
from iPhone - turns up in Outlook
from Outlook - turns up on iPhone
from iCal - turns up in both
Only remaining weirdness is that whilst the iPhone and Outlook seem to be talking just fine - meetings generated in Outlook or on iPhone don't show up in iCal yet I thought iCal was the conduit!! My suspicion is it is something to do with iCal Calendars and Outlooks Categories not being compatible. Anyway's net result meetings sync between iPhone and Outlook.

Yes, I'm running ESET NOD32. I've disabled NOD temporarily but it still hangs on Calanders when syncing! Any ideas?
Many thanks. There's a couple of alternatives.
Either try the procedure in Samoreen's post:
Re: iTunes 11.1.4.62 freezes while syncing with Outlook
Or, see if you can get hold of the Eset beta addressing the problem. As Samoreen notes in another post:
ESET have a workaround for this issue. They gave me access to a test version of the HIPS module and this fixed the problem. So I could re-enable the ESET_OPTIONS environment variable (although I still consider that it's a questionable idea). I upgraded to iTunes 11.1.5.5 and there was no problem.
So maybe you should get in touch with ESET support and request the new module ? Just send a message to Marcos in the ESET forum.
Re: Outlook 2013 Calendar Sync fails with new iTunes 11.1.5.5

My IPhone 4S is hanged during updating IOS 6 to IOS 8, PHONE was connected WIFI and under charging with computor. Kindly help, it is not switching off, not restarting

My IPhone 4S is hanged during updating IOS 6 to IOS 8, PHONE was connected WIFI and under charging with computor. Kindly help, it is not switching off, not restarting

Hi HARISH INDIA,
That is not good but lets see if we can get it back to life. If you can, see if you can put your iPhone into recovery mode and then use iTunes to restore it. If you can get it to restore, it will erase everything off your iPhone. If you have a back up in iTunes or iCloud then you can put that on after the restore is complete. Take a look at the article below for more information.
If you can't update or restore your iPhone, iPad, or iPod touch
http://support.apple.com/en-us/HT201263
Take it easy,
-Norm G.

IPhone-iTunes Syncing Issues (3G Phone w/ 2.2 Firmware & iTunes 9.0.1)

Please feel free to inform me if this inquiry might be better posted in a different section of the discussion forums.
*iPhone-iTunes Syncing Issues*
(3G Phone w/ 2.2 Firmware & iTunes 9.0.1.8 running on a Dell PC w/ Windows XP Pro Operating System)
With the newest 9.0.1 version of iTunes...
When you synch your Windows XP Pro PC with your iPhone (3G) device & instruct the software to synchronize your iPhone Safari "Bookmarks" with your PC's Internet Explorer "Favorites," should there not be a bi-directional transfer of the information?
(from iPhone to PC and also from PC to iPhone?)
I synched my phone yesterday & it appears that there was a successful transfer of Internet Explorer "Favorites" into the iPhone. However, neither were my iPhone Safari "Bookmarks" retained on the iPhone nor were they transferred over to the PC (& into Internet Explorer).
Do I need to also install Safari on the PC to get a successful bi-directional transfer? OR am I simply not looking in the correct place on the computer to retrieve all the Bookmarks that were apparently removed from the iPhone?
Furthermore, I've been experiencing difficulty with getting PodCasts that are already sitting in my iTunes account to transfer over to the iPhone 3G.
When I launch the synch operation, commonly the iTunes progress meter will seemingly go to completion. However, the iPhone will ultimately disappear from the left-side iTunes windowpane & the actual iPhone screen will continue to state: "Sync in Progress." The iPhone will remain in this state for HOURS & HOURS, until I ultimately slide the button to cancel the operation. I have literally left the iPhone connected to the synch computer while the iPhone's "Sync in Progress" status message remained the same for *17+ HOURS. This can not be normal*.
Any insight would be helpful.

Note: I resolved the issue by uninstalling and reinstalling itunes with this procedure;-)
http://support.apple.com/kb/HT1224?viewlocale=en_US

Ipad hangs during backup

Hello,
I have both an iPhone and iPad-1. Both running the latest OS (4.3.3)
The IPhone will synch with my PC (windows 7 - iTunes 10.2.2) without any issue.
The iPad, however, stops at about the 85% mark.
I can cancel the synch on the IPad, but iTunes is still continuing to Synch.
I have tried re-stting the iPad, and re-starting the PC, all to no avail.
Thanks for any help.
Tony

I realize that there are multiple problems that are causing the hang up. But here is what i found out:
I noticed that there was a process that was taking up 50% of the CPU. When i would load ITunes to sync it would go to 100%, therefore locking up the sync in the beginnign to middle of the backup phase. When i looked at Task manage and selected all users i noticed that the system was running AppleMobileDevice.exe and it was using 50% of CPU (nothing else loaded). Somehow when i upgraded to the new version of itunes to be able to sync my new ipad, something must of happened to cause this. I called Apple support and at first they said i would need to uninstall all the itunes programs. But then they mentioned that they have seen a quick fix with a Winsock reset that has fixed the issue.
They transfered me to a senior technical support person and she walked me through the reset. It was as simple as going to the command prompt and typing "NET WINSOCK RESET" (then reboot) and it completed resolved the issue of the sync process locking up in the backup stage for me. The tech person mentioned that if you get the error “remount LSP” say no.
You might want to call them and mention the winsock issue and have them walk you through it. I may not have remembered the command 100% correctly.
I would highly recommend that you check the CPU usage when you feel that you are locked up and see if you are at the 100% level. This is probably why i see a lot of notes on dicussion boards that it is taking hours to go through the sync process.... Hope this helps...

IPod/iTunes 6 hangs during updating

I've just spent most of a weekend trying to figure out why a 40GB click-wheel iPod will not sync with iTunes. I'm at a bit of a loss here. I know there are several (long) posts on update issues - perhaps this is just another case. Here's the low-down:
Gear:
* iPod 40GB 'click-wheel' model, 3.1 firmware (2005-09-23 update), firewire interconnect direct to iMac (no dock)
* iMac G4 1GHz, OS X 10.3.9, iTunes 6.0.1, about 1600 songs
Symptom:
iPod appears on the desktop and can browse folders. iTunes starts. Hangs during iTunes update on a random song. Usually <20 into the list - but sometimes anything up to song 1000. Flashing 'do not disconnect' symbol freezes on iPod LCD, iMac hangs (Activity Monitor indicates a >90% cpu load on iTunes process, generally requires a 'hard' restart to recover the iMac - even after force-quitting the iTunes process).
Tried:
* Reset iPod
* Restore iPod with 3.1
* Restore iPod with 3.0.2 (2005-06-26)
* iPod into disk mode and restore
* iPod disk verify and erase using OS X Disk Utility, restore firmware
* New firewire cable
* iPod into diagnostics mode - run most tests including HDD scan (all pass)
* iMac disk permissions verify/fix
* Delete iTunes preferences and restart - library rebuilds
* Copy music to a new location, delete all iTunes data, now start afresh and
use add to library to rebuild library
* Removed songs and entire albums that sync freezes on (just freezes on
another song)
* Checked out iMac firewire ports with iSight
* Discussed with Apple Tech guy at Genius bar, agreed pretty much all steps
had been covered. iPod exchanged believing something like iPod connector
to be the issue. No difference.
So I'm pretty much convinced at this stage the issue lies with the iMac software. iPod and cable have been thoroughly investigated and changed out. iMac firewire ports work with iSight.
I've seen some posts suggesting deleting and restrong from the 10.3.9 update the iPod driver (iPodDriver.kext). This seems pretty drastic! I'm hesitant to go get a Tiger upgrade - this should work with 10.3.9.
Apologies for the long post - but I'd be interested to hear views at this point.
Thanks
40GB click-wheel Mac OS X (10.3.9) iTunes 6.0.1

Hey, you the man. I just want to say thank you. I hooked up a just repaired touch wheel iPod to my son's g4 iMAC, and it kept hanging on random songs and even the one's it transferred, it did slowly. I tried everything everyone else has, I did restores and erases forever. And it kept hanging up, so I had to frequently disconnect the iPod to get control back of the computer. This morning I was on the phone with Apple tech for over an hour. His conclusion was that because some of the songs weren't purchased from the Apple Store, I needed to manually transfer each song one at a time. I had to go, so didn't get to try it until later today and same problem. Again I called Apple tech support. Guy was very nice, on phone with him for 90 minutes, he didn't think the first advice made much sense. He gave up in frustration when we couldn't get into the disk utility because iPod kept going to automatic update. He told me to call back tomorrow and speak to a specialist. He said he's never had this much difficulty with an iPod. After the call, I managed to get into the disk utillity and do the erase and repair but didn't do anything. When I finally deactivated the auto update, manually transferring the songs one at a time didn't solve the problem. I read your post, started up after disconnecting the iSight firewire cable, took a chance of activating auto update of songs again, and voila, it transferred all the songs (all 176 of them) in about 10 seconds, like a warm knife through butter. And as they said on Saturday Night Live, it felt "like butter." I will call Apple tomorrow and tell them they really need to do something about this. In the meantime, I'll keep iSight disconnected whenever songs are being transferred into the iPod.
Again, your advice is much appreciated. Thank you for the post.
Steve
Mac OS X (10.4.3)
Mac OS 9.2.x

How do I undo an iPhone iTunes sync? Most of my apps were deleted!

I am migrating from Windows XP to Windows 7. I restored my iTunes Music and Video library, now I'm trying to setup iPhone and iPad sync'ing.
When I tried to sync music to my iPhone, iTunes gave me an error saying this phone is associated with another iTunes Library. This is
referreing to my old XP library.
When I did a "sync" of my music, most of my apps were deleted. How do I restore these? How do I tell iTunes that I want that the
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Any suggestions would be greatly appreciated. I am VERY frustrated right now!
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You should have put all of your apps on the new computer.
Whatever is not on the new computer will not be on your iphone.
If you failed to put your apps on your new computer, then you will have to redownlaod them.
Downloading past purchases from the App Store, iBookstore, and iTunes Store

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Hey guys,
Is there any way to get the music on my Mac that I've recently bought on iTunes to my iPhone without syncing my iPhone via USB to my Mac?
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"Is there any way to get the music on my Mac that I've recently bought on iTunes to my iPhone without syncing my iPhone via USB to my Mac? "
No.
"when are we gonna see bluetooth syncing?"
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HI I uprgraded my Iphone to the new ios 8 and now I cant sync it anymore.
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It then says "To authorize the computer for items purchased from the Itunes store, choose store > authorize this computer".
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Hello, toshrobbo.
I've found an article that may help you sort things out with iTunes:
iTunes for Windows Vista or Windows 7: Troubleshooting unexpected quits, freezes, or launch issues
http://support.apple.com/kb/TS1717
Symptoms
This article provides some general suggestions when trying to troubleshoot an issue where iTunes for Windows Vista or Windows 7 won't open, stops responding, or unexpectedly quits. It may be useful to print this document before following the steps outlined below.
Cheers,
Allen

HT1386 Internal Device Error" during iPhone/Itunes Sync

I had this sync error every time I tried to connect my Iphone to my MacBook, "Internal Device Error" and the sync failed. I figured out if I powered off my phone, and powered up again, the sync succeeded.
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I just bought a new iPhone 4 and I too am having this annoying issue. I took the phone back and exchanged it.. We'll see if it happens again.
Hoping for an apple answer here..

Post 2.2.1 upgrade iPhone / iTunes sync crashes iTunes

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Thanks for kicking this off Alex! Some further details on my 2+ hours of trial and error, trying unsuccessfully to solve this problem.
My issue seemed to be triggered by attempting to delete some songs on my iPhone. Delete seemed to be progressing until iTunes hung (spinning beach ball) and finally crashed/quit. "Submit error report to Apple" dialog appeared and I have been submitting them pretty much each time it happens. Looking at iPhone, songs in question appeared to still be there, but interestingly album art was replaced by completely unrelated podcast album art. Song track times listed correctly, but when played it just skipped through each track in a second. So some corruption occurred at some point that might have triggered all this. After restoring, no apps will fully sync (if you select just one app, it will appear to install until nearly done, then iTunes crashes). No music will copy without triggering a crash. Interestingly, personal data (contacts, texts, etc) for built-in apps restored fine.
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Hello,
I've had to completely resync my iphone 3 times in the last week. It seems every 3 or 4th time I plug it into my computer I get the message "An iPhone has been previously synced with this computer.
I am running the latest firmware, the latest iTunes and Windows 7 64 bit.
Then I have the option to set up as new iphone or
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Graham, you might be onto something. I just took a think businesscard and wiped out the connectors. there was some pocket lint in there. Now it says it is synced
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IPhone - iTunes - Syncing never stops ???

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Every time, i connect the iPhone, Sync starts and first does its job well (backup, calendar, adresses, music, and so on)! BUT the Sync then never stops. In iTunes display "syncing iPhone" runs und runs and i have to stop manually after some minutes. The Macs process statistic shows a growing and growing process-tree unil i stop it. Waht to do?
greetings

Seems, as if i have found the reason!!
For upgrading my HD, i cloned the old 320GB on to a new 500GB HD. While cloning, i renamed the original "MacIntosh HD" to the name "MacBookPro HD". For all other Apps, this seems to be no problem. Now, i reconized, exact from that day, itunes worked, like explained. For testing i renamed the HD to "MacIntosh HD" again and iTunes workes fine, like before. May be, some pathes are encoded with the Harddisks Name, spec. Photos.
A.

IPhone/iTunes sync hangs during "backup" phase

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