Possibly Brachychiton populneus subsp. populneus. However closeups showing at a minimum some leaves and how they are arranged on the stem are needed, and preferably also flowers or seed cases as well, for a definite ID. Often a sideways on as well as a head on photo of a flower, and a photo of the back of a leaf, are needed as well.
For a photo of Brachychiton populneus tree taken just below the summit of Mt Majura see https://www.flickr.com/photos/61627737@N03/6032088382/in/pool-1745488@N23/ For more photos of fruits, flowers and leaves view FoMM's Trees of Mt Majura Flickr site https://www.flickr.com/groups/1745488@N23/pool/with/6032088382/