macOS Sequoia 15.4 Update Fixes Several Vulnerabilities; Adds Redesigned Mail App, New Apple Intelligence Features

macOS Sequoia 15.4 update is now available for eligible Mac computers. The latest macOS 15.4 update addresses over 120 security vulnerabilities and includes the redesigned Mail app first introduced on iOS, seven new emoji, and the Quick Start setup feature. New Apple Intelligence features are also introduced, with expanded availability in regions such as India.