How to use Apple’s Mail categorization AI in macOS 15.4
The latest macOS Sequoia 15.4 update brings enhanced security features, Apple Intelligence support across languages, and new AI tools for Mail. These tools prioritize important messages, aiding in managing email flow efficiently. Users cannot create custom Mail categories but can assign emails to appropriate categories manually. The update also introduces a Digest View in Mail and other improvements like a new Sketch style and emojis. With over 50 security updates addressing vulnerabilities, installing the macOS update is crucial for safeguarding user data.

A starting point for messaging automation has finally reached your Mac. Here's how to get everything sorted. If you are among the rapidly-growing number of Mac users in the enterprise, you should know that Apple’s newly-released macOS Sequoia 15.4 is festooned with security updates, brings support for Apple Intelligence across most major languages (including to Europe), and introduces new AI tools for the app you most likely use every day, Mail.
Categories and Features
Those new tools — already available on iPhones in iOS — mean your Mac will try to highlight what it believes are the most important messages you receive, which could help you stay on top of your flow. There are some limitations — the biggest of which is that you can’t create your own Mail message categories. Categories include:
- All Mail: All your Mail as it is received.
- Primary: Messages Apple Intelligence thinks might be important to you.
- Transactions: Invoices, shopping receipts, banking messages.
- Updates: Subscriptions and updates.
- Promotions: Promotional emails.
Navigating Categories
Click on the currently selected category to access the All Mail category, or tap to select another.
Disabling Categorization
To disable categorization on your Mac, tap the three-dot icon above your inbox and choose your preferred view.
Improving Categorization
To change the category of an email, command click on the email in the inbox and select the Categorize Sender item to assign it to a different category.
Custom Categories
Currently, you can't create custom categories, but you can create Smart Mailboxes for specific contacts or topics.
International Support
Apple Intelligence now supports 10 new languages and English language variants, including Chinese, Spanish, French, Portuguese, and more.
Additional Features
In addition to categorization updates, Mail now offers a Digest View and relevant Contact photos in the inbox. Other improvements in macOS 15.4 include a Sketch style in Image Playground, Memory Movie support for custom slideshows in Photos, and new emojis.
Security Updates
This macOS update includes over 50 security updates addressing vulnerabilities across the system, making it crucial to install the new update.
Considerations
If you use driver extensions, you may encounter issues. Open System Settings > General > Login Items & Extensions, disable affected driver extensions, restart your Mac, and re-enable the drivers.