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NelsonYeo Author

Level 1

4 points

unknown error (4000)

can't update my apple 13 mas pro with itunes.

what is the issue?

iPhone 13 Pro Max

Posted on Mar 31, 2022 8:09 PM

Best reply

turingtest2

Level 10

272,921 points

Posted on Apr 1, 2022 7:39 AM

See If you can't update or restore your iPhone, iPad, or iPod touch - Apple Support. If you're trying to update using iTunes try over the air instead, or vice versa.

Note if you're getting a -4000 error when updating from iTunes you may need to remove your device passcode, update, then enable again afterwards.

tt2

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unknown error (4000)

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