And this is your iPhone error 21 fix Windows and Mac solution. Reconnect your iOS device with iTunes.Īfter that, you can attempt to update or restore iPhone with iTunes for a second try. Disconnect your iPhone or iPad from the computer. Actually, it is the universal solution to fix all iTunes related errors. So you can restart iTunes for several times to fix small glitches automatically. Sometimes iTunes is just blocked without knowing why. If you fail to find the cause of error 21, you can try these provided solutions to fix Apple software update error occurred while installing update. Therefore, you need to check above possibilities to find out why error 21 occurs and how to bypass iTunes error 21. It is also possible that malware attacks and iTunes related program issues can cause iTunes error codes as well. In most cases, the main reason is that your iTunes is blocked from authentication while downloading the restore files (.ipsw). When the error 21 message pops up, there is something wrong with your iOS device, hardware or iTunes. As a result, the program crashes and your Windows or Mac computer performs slower or even to be unresponsive. The most obvious symptom is the iTunes error 21 notification box. ITunes error 21 usually occurs when you try to update or restore iPhone or iPad with iTunes. Part 2: Solutions to Fix iTunes Error 21.Fortunately, if you have the similar problems of error 21, then you can read the following paragraphs to get 8 easy and safe ways to fix iTunes error 21. However, both "OK" and "More Information" options are useless. There are only two options you can choose. Please help!"įor most people, having Apple error codes is a tough job for them. Then will say 'The iPhone could not be restored. It will get all the way to 'preparing iPhone for restore'. And when I connect to iTunes, it tells me that I need to restore the phone. then it goes to connect to iTunes screen. "My iPhone won't turn on, but shows the Apple logo when I plug it in. I tried the DFU mode but the iTunes error 21 came up …" "I am stuck in error 21 when I recover with iTunes.
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