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:
