Assertion: kernel | /r/ObjectUse | used in io
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text: By 2000, most large-scale (Mach-like) efforts had ended, although Apple's macOS, released in 2001, uses a hybrid kernel called XNU, which combines a heavily modified (hybrid) OSFMK 7.3 kernel with code from BSD UNIX, and this kernel is also used in iOS, tvOS, and watchOS.