Mac OS X Server expert Michael Bartosh died on Sunday in Tokyo, Japan. He was 28 years old.

According to a posting on Mac OS X Server site AFP548, Bartosh fell from a balcony early on Sunday morning. Local police have ruled Bartosh's death an accident.

Bartosh, a former Apple systems engineer, was author of O'Reilly Media's Mac OS X Tiger Server Administration and Mac OS X Panther Server Administration. Bartosh was president of Mac OS X consultancy 4am Media and a constant fixture at Macworld Expos and Apple's Worldwide Developer Conferences (WWDC).

He was considered by many to be without peer for his knowledge of Mac OS X Server and his willingness to share what he knew.

He is survived by his wife, Amber.