iOS 15.7 Update Failed

bee61 wrote:

Your points make me think I might want to perform updates while connected to Mac in future...

I think that’s especially important for “point” updates, like 16.0 to 16.1. The reason: Most point updates just install patches to the existing iOS if done over the air, but if done using Finder on your Mac the entire new version is downloaded and installed. For major updates its less important (if you have the storage), because they are always full replacements.

Are you getting this error message on your PC, Mac or iPhone?

Update your iPhone or iPad - Apple Support

Settings/General/iPhone Storage

What model phone do you have (from Settings/General/About)?

What was the result when you followed the guidance in the Apple Recommended post at the top of this page?

I'm getting the same: "Software Update Failed" - "An error occurred downloading iOS 15.7". iPhone 12 with latest iOS installed (15.6.1) on both data and Wi-Fi.

My experience was the same. It needed a lot more storage than what most people here seem to think to install.

As mentioned by Lawrence Finch in one of his answers on the 2nd page of this thread, an update by using the computer does not need that much space.

Read my post on this page

ianzki17 wrote:

Hello im having the same problem where did you update the your ios in wifi or pc? I got the same error everytime i update the ios. Thanks

https://discussions.apple.com/content/attachment/67b6c600-31d4-41e7-8d0c-adfdefd5db6f

I have double checked and I cover all the above points, but still get the error.

Quesiton - if I upgrade to the new iOS16, are all the iOS15.7 updates included?

I'm reluctant to upgrade to upgrade due to the usual bugs in the first major upgrade, so my preference is still to get 15.7.

I meet all those requirements, but am still getting the error on IOS 15.6.1 on an iPhone SE Gen 3 connecting to OS X Catalina 10.15.7, downloading over WIFI. Have tried 10 times over the span of the last month, all same results.

bee61 wrote:

No, you don't have to upgrade your phone (at least I don't think so).

You don’t have to update your phone if you don’t mind your phone being susceptible to being hacked. iOS updates, in addition to adding features, also fix vulnerabilities. As a minimum you need 12.7.1 to be secure.

This sub-thread was about the user feeling they were being forced to upgrade their hardware to resolve the inability to update IOS. I was not advising running an old version of IOS and agree the general security cautions related to NOT upgrading IOS. Thanks!

Excellent information, thanks! Now that I've been able to install the update, hopefully I will be able to install the software that allows me to connect the iPhone to my Mac on Catalina. Your points make me think I might want to perform updates while connected to Mac in future...

You don’t need any special software to connect your iPhone to your Mac; it’s there already on your Mac in Finder. Here are the details→Use the Finder to sync your iPhone, iPad, or iPod with your computer - Apple Support