Error Occurred or Unable to install update in iOS 12/ 11.4: iPhone, iPad OTA or iTunes

iPhone, iPad and iPod Touch users are always willing to use new iOS whenever Apple launch in future. For this year apple’s new iOS version is iOS 11 and hope it will prove remarkable success from new features and users experience in iDevice or other Apple’s products. In this many iOS users are reported Unable to install Update or Error occurred installing iOS.

New iOS version will serially release with the version number in Developer Bata, Bate Public, and Public. All three are important for Developer, Tester, and Public end users.

Also, I discussed and tried to fix problems on Unable to install the update in iOS 11 or Can’s installing new iOS 11 for all the users in this tutorial step by step.

Keep full iPhone backup.

Install Now Grayed Out? or Not Starting

Unable to install iOS 11, iOS 11.4, iOS 11.0.1, iOS 11.0.3, iOS 11.1, iOS 11.1.1, iOS 11.1.2, iOS 11.2.1, iOS 11.2.5, iOS 11.2.6 after download, “Install Now” grayed out or not starting the installation.

  • Connect your iOS device to the power source via apple’s lightning cable.

Check Battery

Keep lighting cable connected to download or update old iOS version, because it’s required.

Good internet connection

Some big updates take more internet bandwidth and good internet signal strength. Alternatively, we can use iTunes (Given guide in last of the article).

Reboot or Force Restart/ Hard Reset

Press Sleep/ Wake + Home button until you show Apple logo on the screen [iPhone 6S and Before].

iPhone 8 Plus/8 Plus and iPhone X:

  1. Press and Quickly Release Volume Up button,
  2. Press and Quickly Release Volume Down Button,
  3. Press and Hold Side Button until you see the Apple logo on Screen.

To Start iPhone, Again press Side button until startup apple logo on the screen. iPhone 7/7: Sleep/Wake + Volume Down button until apple logo on the screen. iPhone 6S and Earlier: Sleep/Wake + Home button until you see the apple logo on the screen.

iPhone update stuck on progress bar & Unresponsive: the whole process of update iOS, first take backup your data & Settings in the separate root folder and then restore on new iOS automatically. So obviously it will take too much time, calm down and sit back, wait for complete the process.

Reset Network Settings

By resetting all Network settings, iDevice completely erase old network configurations, DNS settings, Especially for the travelers and international users.

Close settings app

use iOS app switcher and close settings app on the iOS device. Re-launch settings app on home screen and fix all the problems related to update or install.

Enable/ Disable Airplane Mode: Airplane mode is auto turn off Cellular data, the Carrier signal, and WiFi. From the Control center Turn on for 10 seconds and Turn off again. Now try to install iOS 11 update on iPhone, iPad or iPod Touch.

Insufficient storage [iPhone Won’t Update iOS 11.2.1]: Lack of free storage on iPhone, first you go for download latest iOS 11 version, So you must need free space, Free up storage on update iOS 10 to iOS 11/ 11.1.1 or Free up space on iPhone with iOS 11 (iOS 11.1).

1 iOS not updating on iPhone and iPad

Unable to install update on iOS 11 on iPhone, iPad: Error Occurred installing iOS 11, iOS 12

1. How to install iOS Beta, First time on iPhone, iPad?

This is not final and not confirmed new features, and you will get much more in the final version of iOS 11 copy.

You need developer account (Individual, Enterprise or Organizations).

Activate request in Apple is the same in steps but charge and features are different. Depends on our job equation we can activate in 1 day.

Go to the []

Sign up with your personal information and pay for the account.

Download developer profile, and Check for update in settings app (Go to the Settings > General > Software Update).

Remove Developer profile, Re-Download check for new Update

Go to the Settings > General > Profile > iOS Beta Software Profile > Delete Profile.

1 remove developer bate iOS 11 profile on iPhone or iPad

Login Developer account in iOS Safari browser. Re-download and install profile. (Restart required)

Check new update in iOS beta developer (iOS 11.0.3, 11.1 and later Betas) in the settings app.

2. Install Public Beta iOS without Developer account

Public Bata is the intermediate stage of new iOS version, iOS 11 public beta available in July 2017. And it’s free, to get this you need existing Apple ID, Password and log on at

Tap on Download Profile.

After complete download, install profile and New iOS 11 beta available in Settings > General > Software update.

Your Device is not listed on supported devices: Normally this happen many times, Apple left the in-between device update of iOS versions series.

3. Install public iOS 11 – Final copy of iPhone, iPad or iPod Touch

It’s free, doesn’t need login or register iPhone, iPad or iPod Touch. All iOS 11 compatible devices get new upcoming updates automatically under settings.

To check it, Settings > General > Software Update > Download & Install.

Info: Over the air (OTA) iOS update takes more time than iTunes.

iOS Update using iTunes

Update or upgrade with .ipsw file, this installation too much popular call clean install.

  1. Download .ipsw file for your iDevice model (iPhone, iPad or iPod Touch).

After that, Follow the steps given for clean install and Restore backup.

Update iTunes:

Won’t install or stuck new iOS 11 .ipsw file using iTunes, First, check new updates in iTunes.

Above all is the possible fix on Unable to install the update in iOS 11 or stuck & unresponsive between installation.

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About jaysukh patel

Jaysukh Patel is the founder of howtoisolve. Also self Professional Developer, Techno lover mainly for iPhone, iPad, iPod Touch and iOS, Jaysukh is one of responsible person in his family. Contact On: [email protected] [OR] [email protected]