How to Fix An Error Occurred Installing iOS 12

When updating iOS 12, but with message noticing: “Unable to Install Upgrade. An error occurred installing iOS 12”, or “Software Update Failed. An error occurred installing iOS 12”? Check this tutorial to fix it quickly. These solutions also applying to fix the same issue when installing iOS 11.

By Stephen Wilson | Posted on: Sep. 19, 2018, Last Updated: Sep. 20, 2018
Home > PhoneRescue > iOS Data Recovery > How to Fix An Error Occurred Installing iOS 12

The newest iOS 12 has come into our lives, since 17th September. At this time of iOS big improvement and updating, iOS 12 has also brought so many amazing and interesting new features. With so many astounding new things, you must be eager to download and install iOS 12 over the air, or via iTunes. But according to many users’ feedback, when they updating iOS 12, there came an iOS 12 updating bug, a message noticing them “Unable to Upgrade. An error occurred installing iOS 12”, or “Software Update Failed. An error occurred installing iOS 12”.

So far we have not found the reasons leading to an error occurred installing iOS 12, and Apple also has not explained anything. But luckily we still have some practical solutions to fix it. And we have collected them in the following content. Keep reading.

An Error Occurred Installing iOS 12

An Error Occurred Installing iOS 12

Also Read: Most Common iOS 12 Problems and Potential Solutions >

How to Fix An Error Occurred Installing iOS 12

Tip 1. Check If Device Supports iOS 12

Firstly, you need to make sure your iPhone iPad iPod is compatible with iOS 12, or not. For example, iPhone 5 is not supporting iOS 12 anymore, according to Apple saying. To check your device being on the list or not, you can click here.

Tip 2. Turn of Settings app and Wait for a While

If you have tried Retry option many times, but this an error occurred installing iOS 12 bugs is still there, why not close the Settings app and try again later? To remove the Settings App in the background: Double tap Home button > Swipe up on the Settings app until it slides out of view. Several minutes later, try to install the update again: Settings > General >Software Update.

Tip 3. Reset Networking Settings

Occasionally network connection could be the reason why an error occurred installing iOS 12. So you can fix it by resetting device network settings: Go to Settings > General > Reset > Reset Network Settings.

Tip 4. Disable Wi-Fi, and Turn on Cellular Data

This way is similar to method 3, to check network connection. Firstly turn off Wi-Fi, and the switch to cellular data, for like 30 seconds, or 1 minute.

Tip 5. Force Restart Device

If resetting network does not work, you can try force restarting your iPhone iPad iPod touch. Press and hold both the power button and the Home buttons simultaneously, until the Apple logo appears.

Tip 6. Update iDevice to Newest iOS Version with iTunes

Since unable to upgrade and software update failed to occur mostly when iOS 12 updating over the air, so you can upgrade your device with iTunes on the computer instead.

Connect your device to your computer > Run iTunes > Select your device > Choose Summary > Check for Update > Click Download and Update, enter your passcode if asked.

Fix An Error Occurred Installing iOS 12 via iTunes

Fix An Error Occurred Installing iOS 12 via iTunes

If you received the “No Update Found” message when updating with iTunes, there is because of the unpacked iOS update, downloaded before. Go to Settings > General > Storage & iCloud Usage > Tap on Manage Storage > Scroll down to check if you have the iOS 12 update list > Delete it if you have.

The Bottom Line

With these five methods above, you can definitely get rid of unable to upgrade to iOS 12, or software update failed. And also an error occurred installing iOS 12 would be gone, too. If you find these ways working perfectly, please do not forget to share it to help more people. Thanks.

Stephen Wilson

Member of @iMobie_Inc., a die-hard fan of Apple and MOBA games, is always passionate about offering and sharing solutions to any Apple related problems, as well as Android.