Unknown error occurred 4000 during update iPad to 15.0.1
I cannot finish this update and get the above error. What is the reason and what can I do to solve this please? Thank you
iPad Pro, iPadOS 15
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Two alternatives:
Keeping in mind that this workaround can affect keychain and/or Apple Pay (if in use, you might need to re-input data), try these steps to solve error 4000 on your iTunes:
- Disconnect your device from the computer
- Temporarily disable the passcode on your iPad
- Restart the iPad
- Restart iTunes
- Reconnect the iPad to your computer and restart the update procedure.
When finished, re-enable your passcode on your iPhone.
or
Update your iPhone wirelessly (via wifi).
Regards
Giulio