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macOS 15.4 beta 2 now available with Apple Mail redesign, more

macOS Sequoia 15.4 beta 2 is now available for developers. The new release is rolling out a little more than a week after beta 1 debuted. Here’s what to expect.

Apple Mail redesign is highlight of macOS 15.4 so far

macOS 15.4 beta 1 introduced a variety of changes and updates for the Mac.

The headline feature is the redesigned Apple Mail app, which adds the inbox categorization and digest features that first debuted on iPhone in iOS 18.2. It works very similarly on the Mac.

Apple also brought a new proximity pairing feature that enables setting up a Mac faster than before. By following the on-screen prompts in macOS 15.4, you can bring your iPhone nearby to transfer settings to the Mac automatically.

macOS 15.4 beta 1 included a couple Apple Intelligence additions too:

  • Image Playground now lets you create images using a Sketch style
  • Many new languages are now supported by Apple Intelligence

Now beta 2 is available, likely with some additional changes.

We’ll keep you updated on any new features discovered in today’s beta.

One thing we’re not expecting is big upgrades to Siri, which originally had been rumored for inclusion in macOS 15.4 and iOS 18.4.

Mark Gurman reported that those features are now planned for macOS 15.5 and iOS 18.5 with a May release date.

Have you found anything new in macOS 15.4 beta 2? Let us know in the comments.

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Avatar for Ryan Christoffel Ryan Christoffel

Ryan got his start in journalism as an Editor at MacStories, where he worked for four years covering Apple news, writing app reviews, and more. For two years he co-hosted the Adapt podcast on Relay FM, which focused entirely on the iPad. As a result, it should come as no surprise that his favorite Apple device is the iPad Pro.