Six operating systems?
Not an Apple user, but how much do they have in common? Seems like a lot to keep on top of.
Apple has emitted a set of software security updates for all of its major operating systems. The patches address holes in iOS, macOS, Safari, iCloud for Windows, watchOS, and tvOS. For iPhone and iPad users, Apple has kicked out iOS 10.2.1, addressing a total of 18 CVE-listed vulnerabilities, including a bug that caused the …
I think you can read between the lines to guess that the Webkit/Safari bugs were introduced 10.10 or earlier, while the MacOS kernel bug was introduced in Sierra. else they would have issued a patch for the allegedly still supported OS versions before it.
Update Treadmills are _so_ much fun. Especially when they keep taping hand-grenades to the belt.