Ronald Weaver, 79 is located in Wahroonga after four day search

A 79-year-old man with Alzheimer's who went missing from Sydney’s lower north shore has been rescued by SES volunteers after he was found trapped in dense bushland following a four day search operation.

Left: Hannah Weaver at this morning's press conference, right: Missing man Ronald Weaver

An elderly man with Alzheimer’s who went missing from Sydney’s lower north shore has been rescued by SES volunteers after he was found trapped in dense bushland following a four-day search operation.

On Friday morning, 79-year-old Ronald Weaver was located trapped between two trees at North Wahroonga by members of the NSW SES search crew, before he was freed in a co-orodinated emergency operation.

He was then taken to hospital for treatment and rest.

The result comes as a positive ending to what has been a tense four days, ever since Mr Weaver disappeared from Wahroonga on Tuesday morning.

After his family members could not locate Mr Weaver —who usually wears a GPS tracking device but had taken it off to charge that morning — authorities were called, prompting a mammoth search effort.

Ronald Weaver.

A search party of over 100 people descended on the dense bushland on Thursday as part of a coordinated land and air search to locate Mr Weaver.

Due to the density of the bushland being search, assistance was sought from personnel attached to sought PolAir, the Dog and Mounted Unit, Trail Bike Unit, Public Order and Riot Squad, North West Metropolitan Operations Support Group, NSW SES, NSW Rural Fire Service and the National Parks and Wildlife Service.

Hannah Weaver and Acting Superintendent Carleen Marnie at this morning's press conference.

SES Volunteers begin their search of dense bushland in KuRinGai

At a press conference held on Thursday, Mr Weaver’s wife Hannah Weaver was wrought with emotion as she pleaded with the public to help bring her beloved husband home.

“Ronald is my lovely husband and he is a good person. even though he has Alzheimer’s he still deserves quality of life in his age. Please please please help to locate him,” she said.

Acting Superintendent Carlene Mahoney for the Ku Ring Gai Local Area police command also urged people to keep a look out for Mr Weaver while the search operations continued, stating: “Time is critical.”

Following Mr Weaver’s rescue police issued a thank you to the public for their assistance in enquiries.