Appeal to find NSW missing teen

A Blue Mountains teenager missing for nearly two weeks has prompted a police appeal for public help to find him.

Izac Lawrence, 15, last spoke to his parents a week last Tuesday after leaving his home in Katoomba the day before.

He said he was staying with a friend, but it's not known who the friend is or where they live, police say.

The boy, who was officially reported missing on Wednesday morning, is around 168cm tall with a chubby build and short blonde/brown hair.