Developer website: Google Mac Developer Playground
Update Engine is a flexible Mac OS X framework that can help developers keep their products up-to-date. It can update nearly any type of software, including Cocoa apps, screen savers, and preference panes. It can even update kernel extensions, regular files, and root-owned applications. Update Engine can even update multiple products just as easily as it can update one.
Version R3.5: Release notes were unavailable when this listing was updated.
Mac OS X 10.4 or later