Lockbackground.tiff Apr 2026

is a system-generated cache file used by older versions of macOS (typically OS X Lion through macOS High Sierra) to store the image displayed on the login and lock screens. Purpose & Function

how do i change my lock screen and wallpaper into 2 different pics LockBackground.tiff

In newer versions of macOS (Big Sur and later), this specific .tiff file has largely been replaced by , which is stored within a user-specific UUID folder to support multiple accounts with different wallpapers. is a system-generated cache file used by older