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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

Posted on Oct 10, 2021 1:50 AM

Top-ranking reply

ProustGiulio

Level 10

209,082 points

Posted on Oct 10, 2021 1:57 AM

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.

Update your iPhone wirelessly (via wifi).

Regards

Giulio

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Unknown error occurred 4000 during update iPad to 15.0.1

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