Recent releases are listed on the Apple security updates page. Apple on January 26 finally released the iOS 15.3 and iPadOS 15.3 updates to the public, but unfortunately, these updates are focused more on security fixes than outward-facing changes.
APPLE MAC UPDATE REVIEW MAC OS X
The Apple Mac OS X Update 10.5.8 is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, security and compatibility of your Mac.What's New in This Release: Includes general operating system fixes that enhance the stability, compatibility and security of your Mac, as well as specific fixes for: About Apple security updates For our customers protection, Apple doesnt disclose, discuss, or confirm security issues until an investigation has occurred and patches or releases are available. the value in Apples latest updates is in using all of them together.
APPLE MAC UPDATE REVIEW SOFTWARE
Mac OS X 10.5 Leopard is packed with over 300 new features, installs easily, and works with the software and accessories you already have. iOS 15 review - A solid update with excellent new features.