The small update is recommended for all users.
Apple has released a small but important update to all its operating systems today. The update notes for version iOS and iPadOS 13.5.1, watchOS 6.2.6, tvOS 13.4.6, and macOS 10.15.5 are practically non-existent: “This update provides important security updates and is recommended for all users.” The iOS update also includes 13.
