iPhone 12 'backup is corrupt, delete backup and try again'

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Level 1

9 points

iPhone 12 'backup is corrupt, delete backup and try again'

Try to backup ipad air 2 OR iphone 12 Pro Max to MB Pro 14 fails. I've never done backup to this new MBP14. After starting backup in Itunes, I get message 'backup is corrupt, delete backup and try again'

Attempt encrypted backup via itunes

ipad air 2 (15.1)

iphone 12 (15.1.1)

To

MB Pro 14 (12.0.1)

All IOS /MacOS is up to date.

Both fail with message "Could not backup the ipad (or iphone) because the backup was corrupt"

"Delete the backup for this device then try again."

Looking at public support pages, I tried the following

Tried restart of all devices.

Tried different cables and different ports.

Tried reset of network setttings (on iphone) to delete/clear the backup encryption passwd on the iphone.

Tried to backup iphone without encryption, and before it starts I get prompted for device pin on the iphone and enter it, then MBP 14 itunes says "the password you entered to unlock your iphone backup was incorrect, please try again" yet I had done a 'change password' for the encrypted backup.

So since 2 device backups fail with encryption on, and since turning off encryption for both device backup can't be activated, backups of devices to MacOS Monterrey must be a generic problem with IOS/MacOS. And trying to do backups to icloud on slow uplinks (9 mbit) is not practical.....

Backup is basic functionality that should work and should regularly be regression tested...

[Re-Titled by Moderator]

MacBook Pro 14″, macOS 12.0

Posted on Dec 9, 2021 4:41 PM

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Answer 1

ChrisJ4203

Level 10

230,678 points

Dec 9, 2021 5:11 PM in response to RichTxxxxx

See if this helps, If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support. I'm not very familiar with the Mac, so showing me all that other information won't help me. If this does not help, you will have to wait for someone more familiar with the Mac, or you can make contact with Apple Support. I'll wait and see what happens and if you need additional help, I can try to find one of the more senior volunteers here for help.

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Answer 2

ChrisJ4203

Level 10

230,678 points

Dec 9, 2021 4:57 PM in response to RichTxxxxx

If this is a new MBP with Monterey, then you need to be using Finder, not iTunes. See this, Back up and restore your iPhone or iPad to your Mac or to iCloud - Apple Support

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Answer 3

RichTxxxxx Author

Level 1

9 points

Dec 9, 2021 5:01 PM in response to ChrisJ4203

Hi

One month old MBP 14 with Monterrey.

I tried looking in finder 1st, but the ipad and iphone dont show up there (waited 1-2 minutes). Thats when I went into iTunes and the app still supports Backup (UI features - which it shouldn't if its not meant to be used).

I found this in console:

default 17:48:35.178904-0700 kernel postMessageInternal:isPipeOpened:0, msg 185, dataLen 16

error 17:48:35.458590-0700 AppleMobileBackup Backup message response: 205 <private>

error 17:48:35.458951-0700 AppleMobileBackup Backup error: -42

default 17:48:35.461302-0700 AppleMobileBackup USBMuxListenerClose:1585 Closed 0x1448081e0

default 17:48:35.462246-0700 distnoted unregister token: 100000000 pid: 1628

error 17:48:35.464771-0700 AMPDevicesAgent backup error -42

error 17:48:35.489301-0700 AMPDevicesAgent AMSBackupWithOptions failed (3) for device 00008101-001C64383CF1003A

default 17:48:35.494695-0700 AMPDevicesAgent USBMuxConnectByPort:584 Connecting to port 32498 (f2, 7e)

error 17:48:37.351258-0700 AMPDevicesAgent AMSGetBackupInfo failed (3) for device 00008101-001C64383CF1003A

default 17:48:37.352380-0700 AMPDevicesAgent reading _CRCopyDiagnosticMessagesHistoryValue key AutoSubmit-#4 (stat 0: 468, mode: 100664)

default 17:48:37.352710-0700 AMPDevicesAgent AutoSubmitPreference is 0

error 17:48:37.352746-0700 AMPDevicesAgent Assertion failure: err == (-50)

error 17:48:37.352794-0700 AMPDevicesAgent Assertion failure: (event != __null)

error 17:48:37.354793-0700 com.apple.amp.devicesui error registering backup progress: Error Domain=com.apple.mobile.backup Code=-42 "Could not back up the iPhone “iPhone RT” because the backup was corrupt." UserInfo={NSLocalizedRecoverySuggestion=Delete the backup for this iPhone, then try again., NSLocalizedDescription=Could not back up the iPhone “iPhone RT” because the backup was corrupt., AMPDeviceErrorMoreInfoURLKey=}

error 17:48:37.355304-0700 com.apple.amp.devicesui error making backup: Error Domain=com.apple.mobile.backup Code=-42 "Could not back up the iPhone “iPhone RT” because the backup was corrupt." UserInfo={NSLocalizedRecoverySuggestion=Delete the backup for this iPhone, then try again., NSLocalizedDescription=Could not back up the iPhone “iPhone RT” because the backup was corrupt., AMPDeviceErrorMoreInfoURLKey=}

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Answer 4

RichTxxxxx Author

Level 1

9 points

Dec 9, 2021 5:03 PM in response to RichTxxxxx

Actually it appears that iTunes launches finder, with the backup options. In any case the device names dont display in the left most finder frame.

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iPhone 12 'backup is corrupt, delete backup and try again'

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