Apple Releases Mac OS X 10.5.5

Apple has released Mac OS X 10.5.5, the latest upgrade to their Leopard operating system

The Mac OS X 10.5.5 Update is recommended for Mac OS X Leopard versions 10.5, 10.5.1, 10.5.2, 10.5.3 and 10.5.4. It includes general operating system improvements that enhance the stability, compatibility, and security of your Mac.


Apple provides information about the update at Mac OS X 10.5.5 update page no longer available and details security changes at https://support.apple.com/en-us/100100.

You can install Mac OS X 10.5.5 by selecting Software Update... from the Apple Menu at the top left of your screen.