5 Tips to Fix “Unable to Install Update An Error Occurred Installing iOS 12″

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Apple has released iOS 12 which comes with some new features that attracted lost of iPhone users. Again with a new iOS update, a lot of people start getting stuck with issues or minor bugs which makes them unable to complete the installations of the newest update. There are users who have found themselves in a problem where they get a messages saying "Unable to Install Update, an error occurred installing iOS 12". This article will bring a light on this matter and will offer some solutions to resolve the issue. Therefore, if you're unable to install iOS 12 update on iPhone, you can try the tips given below and get the issue fixed by yourself.

unable to install update of iOS 12

5 Tips to Fix "Unable to Install Update" of iOS 12

1. Check iPhone Storage

Being unable to install update when upgrading to iOS 12 can be caused by not enough iPhone storage. In other words, when you get errors while updating to the newest iOS, it can be a hint that your devices storage is not sufficient for the process completion. Hence our first suggestion will be to check it by heading to 'Settings' > 'General' > 'iPhone Storage'. Since the upgrading process really takes some space, if you're not having enough space, you will end up with incomplete and erroneous update issue.

iPhone storage

2. Delete the Downloaded Firmware and Then Try Again

If storage is enough after cleaning the space, you're still not able to install update on iPhone for the message "unable to install update an error occurred installing iOS 12", you can try this tip. It says to remove the downloaded firmware and then try to upgrade to iOS version again. There steps go like this:

If you've earlier iOS version than 11:

  • Open 'Settings' in your device and go to 'General'.
  • Now, tap on the 'Storage & iCloud Usage' tab and tap 'Manage Storage'.
  • You can now see a list of all the apps that are installed in your device including the latest firmware update. Tap on it now.
  • After this, tap on 'Delete Update' and confirm the removal.

If you've iOS 11 and later, follow these steps:

  • Open 'Settings' and tap on 'General'
  • Go to 'iPhone Storage' option. When you find the app list, choose the iOS update and click 'Delete Update'.

delete downloaded firmware

3. Check the Network Connection

Not only storage is the culprit. When your device says, "unable to install update an error occurred installing iOS 12", chances are that the network connection is not good. Therefore, make sure to check it and switch to the stable Wi-Fi connection when experiencing such issue. You can try with another iPhone, or reset network settings if the other iPhone works fine.

wifi not working

4. Force Restart iPhone

Believe it or not, forcing restart the device is always a sensible step when your iPhone stuck with such issues. And hence, we would suggest you to follow the steps of force restart when you become unable to install update when upgrading to iOS 12. The steps for different devices are as follows:

When you are having iPhone 8, 8 Plus or X:

You need to press the 'Volume Up' button and release it quickly. Subsequently, repeat the same with the 'Volume Down' button as well. Now, hold down the 'Power' button and release it when your find Apple logo coming on the screen.

force reboot iPhone 8

When you are having iPhone 7 and 7 Plus:

If you're a user of 7 series of iPhone, make sure to press the 'Volume Down' and 'Power' buttons simultaneously for nearly 8-10 seconds. Stop pressing the buttons when you see Apple logo on the screen.

hard reboot iPhone 7

When you are having iPhone 6 and earlier models:

Press the 'Home' button and 'Power' button at the same time and wait for nearly 10 seconds. You can release the buttons when you see the Apple logo arising on your device's screen.

hard reboot iPhone 6

5. Update iPhone using a Tool (iOS 12 Supported)

If you still fail to install the update on your iPhone due to the error message "unable to install update an error occurred installing iOS 12", you should try iMyFone iOS System Recovery which is a highly recommended tool designed to fix wide range of iOS issues without any loss of data. The best part about this program is it will recognize your iPhone with ease and will then update it with just a single click. Also, it will fix the minor bugs or issues (if any) while updating your device to iOS 12. Here is the step-by-step guide to get the newest version when you're unable to install iOS 12 update on iPhone using the usual method.

Try It FreeTry It Free

Step 1 – Download the program in your PC and install it afterwards. Launch it now and connect your iPhone to the PC using a lightening cable. Once the iPhone is plugged in, select the 'Standard Mode' from the three modes present on the screen.

interface of iMyFone iOS system recovery

Step 2 – Now, click on the 'Start' button and you will notice the instructions on the screen. Go along with the instructions and take your device into DFU mode.

 enter DFU mode under Standard mode

Step 3 – It's time to update the iPhone. You need to click on the 'Download' button now and the program will automatically provide you the latest firmware. The program has the power to detect your device and therefore it will provide the compatible firmware to you. You just have to click on the 'Download' button.

download firmware

Step 4 – When your device's firmware is downloaded, you need to click on 'Start to Fix' button. Wait for a while now and you can then use your device with the new update iOS 12.

fixing ios issues