MacApp was Apple Computer's primary object oriented application framework for the classic Mac OS for much of the 1990s. First released in 1985, it is arguably the first such system to be widely used, notably on a microcomputer platform. Microsoft's MFC and Borland's OWL were both based directly on MacApp concepts. Even with this checkered career, MacApp was used for a variety of major applications, including Adobe Photoshop and SoftPress Freeway.