This guide tells you all you need to know about installing new versions of iOS, upgrading to them, downgrading, and restoring data. Here's what it contains:

When DMG file is mounted then it may ask to move the app to the Applications folder. All you need is to drag and drop the icon to the Applications folder icon. If the file contains the app installer then double-clicking on the installer will start a wizard which will ask questions and eventually install the app in the Applications folder. A file with the DMG file extension is an Apple Disk Image file, or sometimes called a Mac OS X Disk Image file, which is basically a digital reconstruction of a physical disc. For this reason, a DMG is often the file format used to store compressed software installers instead of having to use a physical disc. However, opening a.dmg to get whatever is inside really is as simple as double-clicking the.dmg file. If it's an app in the.dmg, it will be obvious when opened. Or, you could check at the site where you downloaded your.dmg file. That will likely give you actual steps for doing what you want to do.

How to safely update iOS on your iPhone or iPad

Make sure your data is safe

Before starting any iOS update make sure your iPhone or iPad data is saved. You have two options: an iTunes or an iCloud backup.

Save your files in a safe place if you make iTunes backups. Make an iTunes backup and a copy of it which you can store on Dropbox or on a different computer, as a 'plan B'. If you don’t know where the iTunes files are located on your computer, check this article.

Once you make a new iCloud backup, deactivate iCloud automatic backups after the backup is performed. This will stop any unwanted backup being made after you update. It’s an important step, as your initial iCloud backup could be overwritten by an incomplete one, or by a backup of the phone in a failed state.

To deactivate automatic iCloud backups, go to Settings → iCloud and click on Backup. You’ll find a switch button. Turn it off and confirm.

Once you’ve performed a backup of your data, you’re ready to perform a safe iOS upgrade. The procedure is simple.

You have two options to update your iPhone or iPad to the latest iOS, from iCloud or using iTunes.

If you use iCloud or over the air (OTA) updates, here’s what to do. From the Settings menu go to General then select Software update. You’ll see an option called 'Download and install'. Click on it to initiate the iOS update procedure. If you have restrictions PIN active on the phone, you’ll be asked to introduce it.

If you decide to use the iTunes method, you should install the latest version of iTunes. Then connect your iPhone or iPad to your computer and select your iOS device. On 'Summary', select Check for update then choose Download and update. Wait until the upgrade procedure is finished. Don’t disconnect your iPhone before the iOS update is finished.

Common reasons for failed iOS updates -- and fixes 👩‍⚕️

How To Install A Dmg File On Iphone

An iOS upgrade could fail for a lot of reasons. These are the most common ones and the fixes which should be used to make sure the next update will be a successful one:

A network error. If you use the OTA method, this is the most common reason for a failed iOS update. You will receive a message telling you that 'an error occurred downloading iOS'. If you tried to restart the iPhone or you disabled and reactivated the Wi-Fi and you can’t make it work you still have a solution: reset your wireless connection. Go to Settings → General → Reset and choose Reset Network Settings. Check your Wi-Fi connection after resetting.
You need more free space on the iPhone. The default message for this error is: 'Insufficient Space For Download'. Sometimes, the reason for a failed iOS upgrade is the amount of free space available on the phone. To solve this problem, allow app deletion, or worst case make an iTunes or iCloud backup then delete some files. If you have backups, you can get your files back anytime, after the update.
A power failure or a disconnected cable. This is an unpleasant problem, an harder to fix. You have to check if the iPhone is still working or not. The best solution is to connect it to your computer, then initiate an iTunes restore. After the restoration is complete, you can try once again to update your iPhone to iOS.

How to retrieve your data if the iOS upgrade failed

Sometimes instead of updating to iOS, you’re stuck with a failed update or with an older version and a corrupt backup. Even if an update goes wrong, you can still get data back as long as you use the iPhone Backup Extractor.

Depending on where your data was backed up, we recommend you check out either our guide on iCloud data recovery or on getting data back from iTunes backups.

If you get stuck, please drop us a note on live chat. We'd love to help.

How to install an iOS beta

Important things to know before installing an iOS beta

We strongly recommend that before any iOS update you back up with iTunes or iCloud. In fact, such backups should be done regularly in case you ever need to rely on them. This will cover you if:

iTunes doesn't want to restore that data
You don't want all of your data from iCloud or iTunes -- just specific files, or
You want to access all of your iOS device data offline on your computer

How do you access your data if the above happens? It's simple. Use iPhone Backup Extractor, on Windows or macOS, and access your iTunes or iCloud backup with just a few clicks. Our expert support is always happy to help and share from their knowledge and experience, so if you run into troubles or need help, just reach out to us.

To install a full image of an iOS beta on your iPhone, iPad or iPod, you should use the latest released version of iTunes. If you don't have it installed, you can download it from Apple's website. However, modern versions of iOS can be updated to a beta using an 'over the air' (OTA) backup. OTA updates are faster and easier, and won't require the use of iTunes -- or even a computer.

If you need more help, don't forget that Apple publish a document on using their betas.

How to install iOS 14 beta on your device (also works for iOS 13 - 10 betas)

Through the developer beta

On your iOS device, navigate to developer.apple.com in Safari
Click 'account' and log with to your Apple developer account credentials
Select the 'downloads' section
Find the latest iOS beta installation profile, and click to download it
Your iPhone will bring up a prompt, asking if you'd like to install a configuration profile: choose to do so
On your iPhone, go to Settings → General → Software Update, and tap Download and Install
Wait for the install and reboot -- and you're done!

Through the public beta

On your iOS device, navigate to beta.apple.com/profile, and tap on 'Download Profile' section to enrol your device
Your iPhone will bring up a prompt, asking if you'd like to install a configuration profile: choose to do so
On your iPhone, go to Settings → General → Software Update, and tap Download and Install
Wait for the install and reboot -- and you're done!

About Apple's iOS beta programs

There are two types of iOS beta versions available: the public beta and the developer beta, available through the Apple Developer Program.

The difference between the public beta and the developer beta is that the latter allows developers to build or update third-party apps for iOS. Hence, this may include access to additional resources, compared to those included in the public beta.

It is not a good idea to run the betas on your primary iOS device, not least as they can lead to data loss and regular crashes, and can be hard to roll back from. At least, without losing your data. Still, that's where we help. 👊

The developer beta starts a few weeks before the public betas, and is updated earlier, and sometimes more frequently.

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How To Install Dmg File On Iphone