Among the improvements was a simplification of some of the UI element interactions, and support for Multifinder. By this point, around 1987, the system had matured into a useful tool, and a number of developers started using it on major projects. Although "too simple" in its first releases, a number of follow-up versions quickly addressed the main problems. Compiled applications were quite reasonable in terms of size and memory footprint, and the performance was not bad enough to make developers shy from it. MacApp was perhaps the first truly usable framework in all meanings of the term.
Early frameworks tended to confirm this suspicion, being large, slow, and typically inflexible. Writing a Mac program without an application framework is not an easy task, but at the time the object-oriented programming field was still relatively new and considered somewhat suspect by many developers. As part of this process, Clascal was updated to become Object Pascal and Lisa Toolkit offered design notes for what became MacApp. Lisa Programmer's Workshop became in 1985 the Macintosh Programmer's Workshop, or MPW. As Mac sales effectively ended Lisa sales, an effort began to build a new development platform for the Mac.
Initially, development for the Mac was carried out using a cross-compiler in Lisa Workshop. Toolkit was written in a custom language known as Clascal, which added object-oriented techniques to the Pascal language. The engineering team for the Toolkit included Larry Rosenstein, Scott Wallace, and Ken Doyle. MacApp was a direct descendant of the Lisa Toolkit, Apple's first effort in designing an object-oriented application framework, led by Larry Tesler. However, after demonstrating a version at Worldwide Developers Conference (WWDC) in June 2001, all development was cancelled that October. MacApp had a brief reprieve between 20, as a system for transitioning to the Carbon system in MacOS X. Even Apple used CodeWarrior as its primary development platform during the Copland era in the mid-1990s. Symantec was slow to respond to the move to the PowerPC platform in the early 1990s, and when Metrowerks first introduced their CodeWarrior/ PowerPlant system in 1994, it rapidly displaced both MacApp and Think as the primary development platforms on the Mac. Through this period, Symantec's Think Class Library/ Think Pascal had become a serious competitor to MacApp, offering a simpler model in a much higher-performance integrated development environment (IDE). Over a period of ten years, the product had periods where it had little development followed by spurts of activity. Microsoft's MFC and Borland's OWL were both based directly on MacApp concepts. MacApp was used for a variety of major applications, including Adobe Photoshop and SoftPress Freeway. Released in 1985, it transitioned from Object Pascal to C++ in 1991's version 3.0 release, which offered support for much of System 7's new functionality.
MacApp was Apple Computer's object oriented application framework for the classic Mac OS. ( Learn how and when to remove this template message)
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