That’s for all apps, but only for specific parts of the filesystem, so there’s still plenty of room for apps to cause havoc by messing with everything else. Th

That’s for all apps, but only for specific parts of the filesystem, so there’s still plenty of room for apps to cause havoc by messing with everything else. This is separate from the older sandboxing feature that’s designed to fully isolate apps from the rest of the system, which is mandatory for Mac App Store apps but opt-in for other apps.