YAWL 4.2 for Mac can be downloaded from our website for free. This free software for Mac OS X is an intellectual property of YAWL Team. The application relates to Developer Tools.
From the developer:
YAWL is a BPM/Workflow system, based on a concise and powerful modelling language, that handles complex data transformations, and full integration with organizational resources and external Web Services. The most powerful process specification language for capturing control-flow dependencies and resourcing requirements.
You may want to check out more Mac applications, such as Objective Basic, Pleinpot or PLCEdit, which might be related to YAWL.