This tree is grown on the margin of native bush in a northern sunny, shelter area on Mou Waho Is in Lake Wanaka it was about 15 m high. I wonder if it is Hedycarya arborea (Pigeonwood).
The tree
Looks like Pittosporum colensoi to me - Hedycarya doesn't go that far south (Banks Peninsula is southern limit)
Thaks Peter
(JPG format, max 500kB)