Apple Releases Revised Versions of iOS 17.4.1 and iPadOS 17.4.1 With Updated Build Number

Apple on late Tuesday released revised versions of iOS 17.4.1 and iPadOS 17.4.1 with an updated build number of 21E237, according to MacRumors contributor Aaron Perris. The updates previously had a build number of 21E236.

General iOS 17 Feature Orange Purple
The revised updates are available for all iPhone and iPad models that are compatible with iOS 17 and iPadOS 17, but they can only be installed via the Finder app on macOS and the Apple Devices or iTunes apps on Windows at this time. Apple has not made the new builds available over the air in the Settings app on the iPhone and iPad.

It is unclear what changed between the builds, if anything, but any potential differences are likely very minor. For those curious, we have confirmed that the new builds do not contain any references to unreleased iPad models.

There have been sporadic reports on social media about iOS 17.4 and iOS 17.4.1 causing some iPhones to get stuck in a boot loop, so perhaps the new build will allow those devices to be properly restored, but this is merely speculation.

iOS 17.4.1 and iPadOS 17.4.1 were first released last week with bug fixes and security patches.

Related Forums: iOS 17, iPadOS 17

Popular Stories

iPhone Top Left Hole Punch Face ID Feature Purple

iPhone 18 Pro Features Leaked in New Report, Including Under-Screen Face ID

Tuesday December 16, 2025 8:44 am PST by
Next year's iPhone 18 Pro and iPhone 18 Pro Max will be equipped with under-screen Face ID, and the front camera will be moved to the top-left corner of the screen, according to a new report from The Information's Wayne Ma and Qianer Liu. As a result of these changes, the report said the iPhone 18 Pro models will not have a pill-shaped Dynamic Island cutout at the top of the screen....
Apple Logo Top Half

Early iOS 26 Software Leak Uncovers Dozens of Upcoming Apple Features

Monday December 15, 2025 3:05 pm PST by
Software from an iPhone prototype running an early build of iOS 26 leaked last week, giving us a glimpse at future Apple devices and iOS features. We recapped device codenames in our prior article, and now we have a list of some of the most notable feature flags that were found in the software code. In some cases, it's obvious what the feature flags are referring to, while some are more...
iOS 26

iOS 26.3 Beta 1 Features: What's New So Far

Monday December 15, 2025 4:23 pm PST by
Apple is testing iOS 26.3, the next version of iOS 26 that will launch around January. Since iOS 26.3's testing is happening over the holidays, it is a smaller update with fewer features than we've seen in prior betas. We've rounded up what's new so far, and we'll add to our list with subsequent betas if we come across any other features. Transfer to Android Apple is making it simpler...
apple beta 26 lineup

Apple Leak Confirms Work on Foldable iPhone, AirTag 2, and Dozens More Devices

Monday December 15, 2025 2:05 pm PST by
Last week, details about unreleased Apple devices and future iOS features were shared by Macworld. This week, we learned where the information came from, plus we have more findings from the leak. As it turns out, an Apple prototype device running an early build of iOS 26 was sold, and the person who bought it shared the software. The OS has a version number of 23A5234w, and the first...
apple music chatgpt

ChatGPT's Apple Music Integration Is Now Live

Wednesday December 17, 2025 3:50 pm PST by
There's now a dedicated Apple Music app for ChatGPT, which allows ChatGPT to make music recommendations and build playlists. Apple Music can be added to ChatGPT through the Settings section in the Mac app, website, or iOS app. Apple Music is listed under the apps option, and connecting to it requires signing in with your Apple Account for authorization purposes. ChatGPT can be used to...
apple iphone air battery pack

Apple Aims to Boost Popularity of iPhone Air 2 in Two Ways

Tuesday December 16, 2025 11:06 am PST by
We have been covering iPhone 18 Pro, iPhone 17e, and iPhone Fold details from The Information's report about future iPhone models, and next up is the iPhone Air 2. The report says that Apple aims to make the iPhone Air 2 more attractive in two ways. First, Apple is apparently considering adding a second rear camera to the device, which would resolve a key limitation. The current iPhone...
maxresdefault

Apple Developing iMac Pro With M5 Max Chip

Tuesday December 16, 2025 7:30 am PST by
Apple is developing a high-end iMac featuring the M5 Max chip, according to information from leaked internal software. Subscribe to the MacRumors YouTube channel for more videos. The finding comes from leaked kernel debug kit files used by Apple engineers. These kernel debug kit files enumerate unreleased Apple hardware by internal identifiers, such as codenames and platform names, and they...
Apple Foldable Thumb

Leak Reveals Foldable iPhone Details

Monday December 15, 2025 9:09 am PST by
The first foldable iPhone will feature a series of design and hardware firsts for Apple, according to details shared by the Weibo leaker known as Digital Chat Station. According to a new post, via machine translation, Apple is developing what the leaker describes as a "wide foldable" device, a term used to refer to a horizontally oriented, book-style foldable with a large internal display....
apple beta 26 lineup

Apple's 2026 and 2027 Product Roadmap: Foldable iPhone, iPhone 18 Pro, M5 Macs, and More

Tuesday December 16, 2025 4:42 pm PST by
There has been a whirlwind of rumors over the last few days, sourced from leaked internal software designed for the iPhone and the Mac, and news sites like The Information. Below, we have a quick recap of everything we've heard this week, which serves as a guide to Apple's product plans in 2026 and beyond. We've organized the info by likely release date, though there are some products that...

Top Rated Comments

VPsmith Avatar
23 months ago
Doesn’t this seem sketchy to anyone??

First a build that doesn’t have release notes for days. Then we get this new weird build?

What kind of back door did Apple implement temporarily for the feds this time?
Score: 21 Votes (Like | Disagree)
hovscorpion12 Avatar
23 months ago
At this point Apple is trolling. an update that can only be accessed by special means and not OTA.

Either release the iPads today, or don’t. Really becoming frustrating
Score: 17 Votes (Like | Disagree)
nortonandreev Avatar
23 months ago
8.22GB LMAO



Attachment Image
Score: 12 Votes (Like | Disagree)
contacos Avatar
23 months ago

8.22GB LMAO


That's to be expected when you do an update via computer because it has to download the whole file and not just the updated code.
Score: 10 Votes (Like | Disagree)
antiprotest Avatar
23 months ago
Aww, I already updated. Now I have an inferior build. ?
Score: 10 Votes (Like | Disagree)
MrRom92 Avatar
23 months ago
Why not just call it 17.4.2??

I also noticed that last night iTunes no longer allows installation of any version of 17.4… it worked totally fine just a few weeks ago. Why is Apple retroactively blocking an older firmware that is still currently signed? What is with all the strange software behavior lately??
Score: 9 Votes (Like | Disagree)