Apple introduced a unified wallpaper design called Celosia across iOS 27, macOS 27, and CarPlay for the first time, replacing platform-specific wallpapers with a cohesive aesthetic. The design features sweeping curves and soft shadows inspired by layered petals or folded paper, with a stylized "27" embedded in the pattern. Light mode blends warm sandy gold and soft purple, while Dark mode uses deep indigos with silvery-blue edges. iOS 27 and iPadOS 27 offer three variants—standard, Dynamic, and Color—each with Light/Dark modes optimized for Home and Lock screens. macOS 27 Golden Gate includes dynamic wallpapers accessible only through the OS, while CarPlay’s first developer beta provides 14 Celosia options across eight color variants and a Hero mode.

The shift reflects Apple’s effort to create a seamless ecosystem experience, though implementation details for CarPlay remain limited to beta testing.