Macintosh Programmer's Workshop

Macintosh Programmer's Workshop or MPW, is a software development environment for the Classic Mac OS, written by Apple Computer For Macintosh developers, it was one of the primary tools for building applications for early classic Mac OS systems running on 68k processors. Initially, MPW was sold as a commercial product but Apple eventually made it a free download.

MPW provided a shell-like environment (similar to Unix) which included, C and  compilers. The Power Mac Debugger was not integrated into MPW like most IDEs of today but the language compilers supported the symbolic debugging information file format used by the debugger. Many developers preferred using CodeWarrior to build classic applications for PowerPC processors at which point MPW was made available for free.

MPW was deprecated with the release of Xcode in 2003 for Mac OS X development. MPW can also be used to develop Mac OS X applications, but only as a Carbon build for PowerPC processors. Intel binaries and the Cocoa API are not supported by MPW.

Apple has since officially discontinued further development of MPW and its website.