Kingi was taken outside on to the balcony, 3.9m above the ground.
Police said Harwood forced Kingi over the rail but Kingi clung on.
"As Kingi tried to swing one leg up to the balcony, in an attempt to pull himself back up the defendant prised at Kingi's fingers, forcibly causing him to release his grip from the handrail," the police summary of facts said.
Kingi fell headfirst on to the concrete below.
A neighbour who witnessed the fall called an ambulance while Harwood went back inside the apartment.
Kingi suffered a fractured skull and brain injuries. He died the next day in Auckland Hospital.
At court today, Justice Timothy Brewer released Harwood on bail until sentencing next month.