今晚要升級 iOS7 GM，結果看到說 一定要先安裝 iTunes 11.1 beta2 備份過才能回復手機，馬上裝起來按備份，沒想到一直跳出這個視窗：
然後手動備份的話也還是會顯示備份失敗：Backup session failed
後來發現好像是之前安裝了一些只能run在32bit的 Visualizer 外掛，所以把 iTunes 改成「在32位元模式下打開」了。
把 iTunes 改回 64bit 模式，然後刪除那些不支援的 plug-ins 就ok了！順利升級！
然後把發現的結果 Po 在 Apple 官方論壇還有這裡，希望可以幫到更多人摟！
Before I begin: I am now over 6 hours on trying to fix this problem .. by searching through this forum and others sites. This is my problem when I was going to update my iPhone 5 to iOs7 GM.
After I installed the iTunes 11 beta 2 from the developer center. I tried to make a back up of my iPhone before I was going to update.But when I am clicking on Back up I receive this message:
‘iTunes could not backup iPhone ‘Ramon’s iPhone’ because the backup session failed’
When I am starting Itunes it starts with this error:
Itunes was unable to load data class information from Sync services
What I did to solve this problem:
– Disconnecting the Iphone for a couple of times
– Restarted my iPhone
– iPhone in airplane mode
– Re-installed iTunes for 6 times
– Logged in on my mac with an another account
– Reset the lockdown folder
– Deleted the back ups in the Mobilesync app
– Deleted AppleMobileDevice.kext
– Changed the time and location of my mac
Could someone please help me? I am so tired of searching out what to do..
Thank you in advance..
I am having the same issue.
Trying to backup my iPhone4S with prior ver of GM, by iTunes 11.1 beta2, before updating iOS7 GM
I solved it by
1. make sure the iTunes is running in 64bit mode
Right clicking the iTunes application icon in the application folder, select Info, and uncheck/deselect the “Open in 32-bit mode".
2. open up the iTunes
3. If there is an alert window pop up, like this one, and telling you that there are several plug-ins cannot running on 64bit mode, go /Library/iTunes/iTunes Plug-ins/ and ~/Library/iTunes/iTunes Plug-ins/ , delete those unsupport plug-ins
4. re-open the iTunes
Now it should be able to backup your iOS device correctly.