For the similarly named planet, please see Magus III.
Makus III was the inhabited third planet of its star system in the Alpha Quadrant. Makus III was located 3 days away from Murasaki 312 at warp 1. (TOS: "The Galileo Seven")
In 2267, the USS Enterprise carried emergency medical supplies to Makus III, for transfer to the New Paris colonies. (TOS: "The Galileo Seven")
In 2293, the location of Makus III in the Milky Way Galaxy was labeled in a star chart that was in Captain James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)
In 2328, this planet was home for the Makus III Spaceport. (TNG-R: "Inheritance")
In 2371, the location of Makus III was labeled in the star chart Data and Picard were studying in stellar cartography aboard the USS Enterprise-D in 2371. (Star Trek Generations, okudagram)
According to Star Trek: Star Charts ("United Federation of Planets I"), in 2378, Makus III was listed as a Federation member.
According to Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Makus III's primary was a K-class star.
According to Star Trek Maps (p. 27), Makus was a recently colonized frontier world. It was the site of a Starfleet supply base and a thriving agricultural colony, with a population of 71,000, that exported local foods and pharmaceuticals.