Since I upgraded to iTunes 10.7, I can no longer sync my iPhones nor my iPad. iTunes says "could not back up ... because a session could not be started". I'm on w7x64, updated.

Exactly the same problem for me.

I got around it by backing up to icloud from the device. Then you can actually sync (although I think the iphone/ipad should be syncing anyway, it just can't get a backup). But yeah as soon as I upgraded to itunes 10.7 I had the exact same issue as you.

And ever since upgrading to iOS 6 I now can't sync my devices over wifi - they just don't appear in the devices list no matter what I try.

There have been major issues with these recent updates for me I have to say, and along with them dropping google maps, it's putting me off.

Hopefully solutions will be found soon.

I am having the same problem with 2 iPhone 5's, 1 iPhone 4s, 1 iPhone 4, and a new iPad. Seems to me the problem is burried in software and not the devices.

I am trying to restore my new 5's from back up but I can't get past this part. I have tried deleting all old back ups and making new ones with the old iPhones but still... nothing.

http://support.apple.com/kb/HT1747

this just worked for me!

This has been happening to me as well I upgraded to 10.7. It's happening with an iPhone 4GS and with an iPad 2.

It happened to me, as well. I reimaged and tried a bunch of the options I've found on the boards and nothing worked. I eventually downgraded iTunes. Can't/won't upgrade iOS until I can get a working version of iTunes--or at least one that does local backups properly. iCloud is a reaonable alternative, but iTunes is faster in terms of a restore and gives a good measure of backup redundancy.

I contacted Apple support and completed removed Itunes 10.7, icloud, etc... Did a clean install of Itunes 10.7 without re-installing icloud and still have the same error messages.

Running Windows 7 and Outlook and upgraded both iphone 4s and New Ipad to 6.0 at the same time.

This *****.

How did you downgrade? The same thing is happening to me with iTunes 10.7. Everything stopped working inlucding my Apple TV

I am not sure you can downgrade since all my devices are now running 6.0

That is the million dollar question!

Will 6.0 devices sync w/ 10.6 Itunes?

I haven't tried myself, but theoretically iTunes 10.7 adds support for iOS 6. That would preclude chances of 10.6.3 supporting iZoS 6, unortunately.

Same problem but here's the trick that works for me:

when you get the sync error message, keep the iPhone you want to sync plugged into your computer and QUIT iTunes. Then, immediately restart iTunes and the iPhone immediately starts to sync. Give it a try and report back if it works for you. I did this workaround with two iPhone 5s and an iPhone 4 that all got the error message when trying to sync with a cable and this worked with all of them.

Ok here is what worked for me. I hooked my iphone and ipad up to my laptop and synched it with the cord. After that I did the wifi synch and it worked perfectly!

I have had this problem with Windows 7 and iTunes updates for some time. Each time it takes hours to solve but with the over the air upgrade to IOS6 on my iPhone and iPad, I was determined to solve and remember what I did, So here it is:

http://www.care4pcs.co.uk/2012/09/pear-shaped-apple-ios-6-for-iphone-ipad.html

I hope this helps you and any other users.

I had this problem a few times.

So in iTunes, on my iPhone tab, I un-selected the checkbox to "Sync this iPhone over Wi-Fi".

On my next Sync it backed up just fine. (Note that in this case I was backing up to my computer, not to iCloud)

So it could perhaps be something like a router problem, completely outside the regular iPhone / Computer sync. That would make it hard to diagnose, since everybody uses different routers.

-James

This is what worked for me.

1) In ITUNES, right click on the device you are attempting to sync

2) Select Backup, if the backup fails, try it again several times in rapid succession until it completes. Mine completed on first attempt.

3) After a successful backup, you should be able to sync the device