com.apple.security.files.downloads.read-write
A Boolean value that indicates whether the app may have read-write access to the Downloads folder.
Discussion
To add this entitlement to your app, enable the App Sandbox capability in Xcode and set Downloads Folder to Read/Write.
See Also
Files and media
App Sandbox Entitlementcom.apple.security.files.user-selected.read-onlycom.apple.security.files.user-selected.read-writecom.apple.security.files.downloads.read-onlyPrivileged File Operationscom.apple.security.assets.pictures.read-onlycom.apple.security.assets.pictures.read-writecom.apple.security.assets.music.read-onlycom.apple.security.assets.music.read-writecom.apple.security.assets.movies.read-onlycom.apple.security.assets.movies.read-writeAll files entitlementData Protection Entitlement