Developer Apparently Reports Updating Application for iPhone OS 4.0 [Updated]
CNET reports that it has received an e-mail from a "prominent" iPhone application developer noting that the developer's application has been updated for iPhone OS 4.0, implying that Apple has already delivered an early version of the updated operating system and development tools into the hands of select developers.
iPhone OS 4.0 is imminent. At least, that's the only conclusion I can draw from an e-mail I just received from a prominent app developer.
The message includes the following snippet: "Just wanted to give you a heads up that we've submitted an updated app for the new iPhone OS 4.0 software."
In the past two years, Apple has held March media events introducing iPhone OS updates and providing tools to allow developers to implement the new features included in the revisions ahead of the public launches of the new operating systems in June or July. Apple has, however, offered demos of applications running on the new operating systems at these March events, indicating that select developers had been provided even earlier access to development tools for the new iPhone OS versions.
One wildcard in the development of iPhone OS 4.0 may be Apple's tablet device, which has been rumored to be at least based on iPhone OS and is expected to be introduced later this month. A report from earlier this month indicated that Apple may be preparing to launch a beta version of iPhone OS 4.0 at this month's rumored media event. A separate report earlier this week claimed that the tablet does in fact run on the iPhone OS kernel and that the inclusion of tablet-related code in the latest iPhone OS versions has precluded Apple from offering any new software updates for the iPhone recently.
Sketchy evidence of iPhone OS 4.0 appeared in Boy Genius Report's browser logs in mid-December, although such data is easily faked. Soon after, an entry for iPhone OS 4.0 appeared in a developer's analytics data.
Update: MacRumors has identified and communicated with the developer of the application in question, and it appears that the mention of "iPhone OS 4.0" was in fact an error in the press release issued by the company. As was postulated by The iPhone Blog, the application had actually been updated to version 4.0 rather than for iPhone OS 4.0, which was likely the source of the error.
Popular Stories
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....
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...
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...
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...
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...
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...
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...
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....
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...