This article is from the FAQ, by with numerous contributions by others.
MPW stands for "Macintosh Programmers Workshop", which is the official
programming environment for the Macintosh, developed by Apple, Inc. The BETA
compiler runs as an MPW tool, that is, it is a command, that can be invoked
from the MPW Shell (command interpreter).
You will need MPW 3.4 or later to use BETA. In addition to the MPW Shell,
the compiler uses the MPW Link and Rez tools to build the programs.
As of october 1997, Apple has decided to make MPW freely available for
downloading. You can download it from
The current versions of the packages needed are
Please notice, that new versions may have been available when you read this.
As an alternative to Apple's MPW, you can use the MPW supported by
Metrowerks CodeWarrior. The MWLinkPPC linker included in this commercial
package is is up to 10 times faster than PPCLink from Apple.