For whatever reason, continuously pressing the Power button will almost always resolve the stuck “verifying update” error.
Sometimes it takes 5 to 10 press cycles, but doing so seems to push the i OS update along and the verification process suddenly accelerates and completes.
If the Power button trick doesn’t work, and you forced reboot the i Phone or i Pad and everything is messed up or not working, you’ll have to restore the device with i Tunes as described here.
Before doing anything else, be sure of the following: the i OS device must have an active wi-fi connection, the i OS device must have enough available storage space to install an update.
Note that seeing the “Verifying Update” message is not always an indicator of anything being stuck, and it is perfectly normal for that message to appear on screen of an updating i OS device for a while.
You’ll know if the Power button trick works because the device screen will go black and you will see an Apple logo followed by a progress bar, as the i OS update starts to install as usual.
If an hour or more has passed and the power button trick fails, you can try to force reboot the i Phone or i Pad by holding down Power and Home until you see the Apple logo.
Once the device has booted back up again you can attempt to reinstall the update by going to “Settings” then to “General” and to “Software Update” and choosing “Install” as usual.
Many users who are installing i OS updates (whether beta or final versions) encounter an issue where a spinning pop-up indicator message saying “Verifying update…” appears stuck on screen.
This is a fairly common issue that is somewhat annoying because while the i OS update is verifying, the entire i Phone or i Pad is unusable.
The good news is this typically resolves itself in short order. This will force the i Phone or i Pad to lock the screen, then wake the screen up again, then lock again, and wake the screen up again.
Repeat this several times in a row, waiting a few seconds in between each press.