Mac OS X 10.5.4 Update
Add a new Mac to your Mac. Mac OS X v10.5 Leopard is packed with over 300 new features, installs easily, and works with the software and accessories you already have.
Learn more about Mac OS X.
What’s New in this Version
The 10.5.4 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac.
For detailed information on this update, please visit this website:
About Mac OS X 10.5.4
For explanation of what a SHA-1 digest is, please visit this website:
About SHA 1 digest
For detailed information on security updates, please visit this website:
About Security Updates