Apple Releases iOS 18.4 Beta With New Features and Temporary Device Restrictions

The beta introduces Priority Notifications, Ambient Music, and Vision Pro support, but is unavailable for iPhone 12 models due to technical issues.

iOS 18.4 beta adds Priority Notifications, which highlights important alerts on the lock screen using Apple Intelligence.
The update introduces Ambient Music in four categories—Sleep, Chill, Productivity, and Wellbeing—accessible from the Control Center.
Apple News+ now includes a Food section featuring recipes, restaurant stories, and healthy eating tips curated by top publishers.
Vision Pro support allows users to manage the headset, including guest mode and content discovery, via iPhone or iPad.
The beta has been pulled for iPhone 12 models and select iPads due to a boot loop issue, with a fix expected in future updates.