iPhone X: Error 4005 - how to fix it

You will see error 4005 in iTunes if you encounter problems when trying to update or restore your iPhone X, respectively. Often in this case it is helpful to force restart the device. You can read how this works and what other tips help here.

iPhone X: Error 4005

Sometimes you may encounter problems when trying to update or restore your iPhone X using iTunes. If you see the error code 4005, it means that an unknown error occurred and the iPhone could not be updated.

1. To fix the error message, please install the latest iTunes version on your PC or Mac and force restart your iPhone X.
2. To do this, first briefly press the "Volume Up Button" and then the "Volume Down Button". Then press and hold the upper button until the Apple logo appears on the screen and the device reboots.
3. Now connect the iPhone X via USB cable to your computer and click "Update" in iTunes to reinstall iOS on the device.

This will help if error 4005 continues to occur on iPhone X

Have you followed the steps above but error 4005 continues to occur, check if there is an update for your Mac or computer. Sometimes, it also helps to use another USB cable to connect iPhone X and computer or another computer for recovery. If you can't fix the problem even with these tips, please contact Apple Support for further assistance.