Apple's macOS 15.4 update, set for April 2025, will introduce a redesigned Mail app featuring AI-driven enhancements. New features include automatic inbox categorization (e.g., Primary, Transactions) and prioritized email sorting, streamlining email management across Macs and iPads. This follows similar iOS 18.2 updates. The redesign aims to create a seamless, efficient experience across Apple devices. Beta testing will begin soon.