A selection of images of the latest developer build of Mac OS X 10.5 Leopard have appeared.

The images reveal that lots of work has taken place in the development of the software, with Mail, Safari and iChat all seeing recent re-builds since the first major OS X 10.5 pre-release beta appeared two months ago.

Work has taken place across all the system applications, a report on ThinkSecret claims.

New features include Parental Controlsm which can restrict access to applications and folders. 'Guest User' accounts also appear - ideal for sharing Macs with others.

The new build is reportedly more stable than before.