Monastic Formation on Athos
Macarius was born at Thessalonica and, after the death of his mother, embraced the monastic life he had desired from his youth. According to the tradition recorded by later sources, he entered the Monastery of Vatopedi on Mount Athos around 1409, where he was tonsured after a period of testing and spent roughly a decade in obedience and ascetic exercise before being ordained deacon and then priest.
His years on the Holy Mountain shaped a reputation for both spiritual seriousness and learning; sources describe him as an able orator and an interpreter of Holy Scripture.