Sgt. Andrea Urena of the Santa Clara County Sheriff's Office said no foul play was suspected in the death of the male employee on Apple's main campus in Cupertino.
On Thursday afternoon, The Medical Examiner determined the manner of death was suicide and the cause was a gunshot to the head.
WATCH VIDEO: Man found dead in Apple conference room was employee
Deputies were called about 8:35 a.m. Wednesday for a report of "a person down" and found a dead man, she said. "They determined there were no other individuals involved and they believe it was an isolated incident and that there was nobody else on campus or in the public at risk," Urena said.
Apple said in a statement it is working to support the people who worked with the man. "We are heartbroken by the tragic loss of a young and talented coworker," the company said.
ABC7 News contributed to this story.
Santa Clara County Medical Examiner's Office says doctor has not yet released cause of death for #Apple employee Edward Mackowiak.— Matt Keller (@MattKellerABC7) April 28, 2016
#Apple employee found dead in conference room at Cupertino headquarters identified as 25 yr old Santa Clara resident Edward Mackowiak.— Matt Keller (@MattKellerABC7) April 28, 2016