macOS 15.4
Juli Clover (release notes, security, enterprise, developer, full installer, IPSW):
With macOS 15.4, Apple is bringing Mail Categorization to the Mac. The Mail app features dedicated categories like transactions, updates, and promotions, with important emails organized into a primary section.
Apple News+ subscribers now have access to an Apple News Food section with recipes, food articles, and more. There’s a new Sketch style for Image Playground, Memory Movie support in the Photos app for custom slideshows, and new emoji characters.
See also: Mr. Macintosh and Howard Oakley.
FSKit is now available, enabling delivery of user space file systems as Application Extensions. These file systems support integration with DiskArbitration.
[…]
To enable the new HTTP loading mode, set
usesClassicLoadingModeto false onURLSessionConfiguration. The new loading mode will become the default in a future release.[…]
Fixed: M4 Macs are unable to launch virtual machine, and attempts result in a system restart.
FSKit on macOS 15.4 doesn’t seem to work without manually writing some files to a place where we shouldn’t… Did anyone at Apple tested this before shipping it 🫠
TIL they put this toggle under “General -> Login Items & Extensions -> File System Extensions”… macOS settings is a mess 😛
Historically the boundary was at the transport layer. When you enable the new loader,
URLSessionuses Network framework’s HTTP implementation.
Incidentally, before updating my Mac mini, I got an “Upgrade to macOS Sequoia” notification even though the Mac was already running Sequoia (15.3.2).
[…]
After the updates, both my Mac mini and my iPad showed one of the most confusing “welcome” screens that I’ve ever seen. Indeed, they confused even me!
[…]
The two options given were “Continue” and “Only Download Automatically”. Which of those two did I want? Confused, I selected Continue.
I turns out that I wanted neither.
It looks like a dark pattern to encourage people to auto-update.
I have not found a way to suppress this screen using a defaults command, but it is possible to suppress the Update Your Mac Automatically screen on macOS Sequoia using a configuration profile.
Our long Apple Intelligence nightmare is over, I upgraded to 15.4 on two machines and neither turned that stuff back on! Still wasting several GB of storage, but it’s progress.
The release of macOS 15.4 builds is different from that of RC2. YET my computer does not update.
Apple has added new management options for Apple Intelligence as part of the release of macOS Sequoia 15.4.
PSA: don’t upgrade macOS to 15.4 if you need to use Xcode 16.2 - the lldb debugger is crashing on start.
Previously:
- macOS 15.4 Adds TCC Events to Endpoint Security
- macOS 15.3.2
- Apple Intelligence Enabled Automatically
- M4 Macs Can’t Virtualize Older macOS
- Apple Intelligence in macOS 15.2 and iOS 18.2
- Beta for Apple Intelligence in Apple Mail
- WWDC 2024 Links
Update (2025-04-01): Ric Ford:
Apple apparently has no interest in fixing its recurring bugs with home folder relocation, forcing security compromises in unacceptable workarounds. Lee Mendoza emailed us about his latest tests of the longstanding problem.
The issue with System Integrity Protection (SIP) preventing users whose home directories are not on the boot volume has not been resolved in the macOS Sequoia 15.4 release. This is a recurring issue that most recently started with macOS Sequoia 15.3 and has persisted in the 15.3.1, 15.3.2, and 15.4 releases.
damn it, the macOS 15.4 and iOS 18.4 may be the worst release for app developers so far. It is “just” a minor update, but it feels like if some major changed in the platform.
this time broken URLSession
Things are super broken for me and users are seeing it too.
Anyone else encountering the problem with that Seqouia 15.4 update simply not installing?
For me it downloaded (I think, at least it was busy for a while), reboots as if applying the update (but that goes too quick) and then comes back as 15.3.2 with an update available.
[…]
It was insufficient disk space. No warning, no message. Just fails.
[…]
And why was there insufficient disk space? 100s of GBs of Xcode simulator detritus.
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> FSKit is now available
Is there any official sample code for this API (that was not worth presenting officially during WWDC)? Or is it just the online documentation at this time?
Used the search feature on the Developer site and did not see a hit for sample code.
