If you try to update or restore your iPhone or iPad with macOS Catalina 10.15 in Finder, or on macOS Mojave 10.14 or earlier, or a PC with iTunes, you might see Error 53 on your computer.

For anyone who experienced error 53 before February 2016, Apple released an update in iOS 9.3 to allow you to successfully restore your device using your Mac or PC. Use the steps in this article to restore and recover your device. If you believe that you paid for an out-of-warranty device replacement based on an error 53 issue, contact Apple Support to ask about reimbursement.