The 2.0 version of KingArthur for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Games, more precisely Puzzle.
This application's bundle is identified as hr.oceanmedia.KingArthur. We recommend checking the downloaded files with any free antivirus. The actual developer of this software for Mac is Big Fish Games. The following versions: 2.0 and 1.0 are the most frequently downloaded ones by the program users.
From the developer:
Use magical runes as you battle the evil Morgana and Mordred, who attempt to usurp the throne of England, in this fun Hidden Object game! Follow Arthur’s rise from boy to king! Narrated by Merlin, King Arthur traces the well known tale of Arthur from the time that he was a boy, and happened to pull the enchanted sword out of the stone, to his years as the greatest king of all of England.
You may want to check out more Mac applications, such as New Yankee in King Arthur's Court 2, which might be similar to KingArthur.