Dogcow

As all Mac wizards know, "moof" is the preferred statement for dogcows.

Although all dogcows look the same, this is probably the very one that appeared in that stack, in which case his name is Clarus.

Mac creators dropped the dogcow in later OS versions, but online petitions and press coverage designed to "bring back the dogcow" have made Apple executives aware of the tremendous cult following of this hybrid icon.